In the diving field, China team has the reputation of "Dream Team". A diving action completed in a few seconds, the average audience usually sees the effect of entering the water, that is, the size of the splash. In fact, splashing is also a high-precision technology. A reporter from Beijing Morning Post recently invited Yu Fen, head coach of Tsinghua diving team, to give a detailed answer to this technology.

　　Hand shape

　　There are slight differences between China and foreign countries.

　　In the diving competition, watching the slow-motion replay will find that the athletes enter the water with their palms in contact with the water surface, not the fingertips as generally believed. A "technical post" circulating on the Internet explains that water spray belongs to the category of fluid mechanics, that is, the process of collision between solid and fluid. Entering the water with your fingertips is equivalent to forming a wedge, so when you fall into the pool, you will find a way out along the direction of least resistance because of the incompressibility of water, and the inclined plane of the wedge is this direction. However, when the object colliding with water has a certain cross section, the water mainly moves laterally, and it can’t be rushed up due to the pressure of the surrounding water, which is the reason why the palm spray is small.

　　Yu Fen introduced that in the past 40 years, the technology of pressing the splash with the palm of your hand has been widely used in countries with relatively advanced diving. "We call it the palm-turning technology. The main point of action is to point your palm at the point where you want to enter the water at the moment of entering the water, and hold the other hand with one hand. " This is the hand type commonly used by athletes in China, while some foreign athletes will put their thumbs together, their fingers open and their hands crossed when entering the water, with their palms facing the water. In addition, there are two unusual hand types: one is that the five fingers are open, and the two hands are kept at a distance of about 10 cm; the other is that the two thumbs are clasped, the fingers are bent and the palms are facing the water.

　　posture

　　Splash suppression is not just about hands.

　　Yu Fen told the Beijing Morning Post that the hand shape is only one of the details of the entry action, but it is not the only criterion to judge the entry effect, which determines that the entry action needs a series of essentials.

　　"Simply put, the athlete’s body should enter the water perpendicular to the water surface. The specific requirements are that the arms should be close to the ears, and the head, shoulders and toes should be in a straight line. At the moment when the palm touches the water, the body should be in a straight line of 90 degrees with the water, and the waist should not be loose, and the buttocks should be clamped. Sometimes you can see athletes appear when they enter the water ‘ Passed ’ Or ‘ Not enough ’ Phenomenon, the water is very big, and the completion of the branch is very low. The reason for this phenomenon is not necessarily that the water entry technology is not done well, and problems often appear in the air. The specific reasons need to be analyzed in detail. "

　　In fact, when entering the water from a 10-meter platform, the instantaneous speed reaches 15 meters per second. Because it is difficult to completely stop the rotation of the body in the air when entering the water, the palm needs to adjust its direction, not just parallel to the water. This is to avoid injury. Yu Fen introduced that on the basis of mastering the essentials, athletes also need to protect themselves through minor adjustments.

　　opportunity

　　Opening time affects the effect

　　"As mentioned earlier, there is a problem with the water entry effect, and we can’t just find problems from this link. As the last link in diving, the technique of splashing can really attract the attention of ordinary audience, but it is difficult to make it clear simply by talking about this link, just as athletes can’t just practice splashing. When they are training, if there is a problem in one link, they will have to re-enter the springboard or platform, and all the processes will be repeated. "

　　Yu Fen introduced that the whole process of diving is divided into seven links from the beginning of the athlete’s running platform or walking board to the end when the toes are completely below the water surface. "They are all interlocking. If one link is not done well, it will directly affect the back until it enters the water." Although when watching the diving competition, I sometimes hear the commentary mention that "the splash effect is ok, and it can be somewhat remedied", but judging an action, flaws and mistakes still cannot escape the eyes of the referee.

　　"Every movement has to go through thousands of exercises before it can be polished to the best. Before pressing the spray, the forming time of the action is also very important, which is what we call ‘ Open the opportunity ’ If it is opened too early, the athletes will stay in the air for a long time and cannot concentrate their strength completely; If it is too late, there is no time to adjust your body to the best position angle. "

　　give a mark

　　The referee won’t just stare at the splash.

　　Similarly, the referee’s score should also be based on the whole process of the diver’s completion of the action. "Not to say that in the end, the referee will give him points. (The splash is not pressed well) it does have an impact, but if the air attitude and the angle of entry are well done from the beginning of the take-off, this action can still be considered successful and the score can still be higher. "

　　There is an important message in the scoring of diving rules: the judge will evaluate the score according to the athlete’s run-up (i.e., running board and platform), take-off, air and water entry, and also explain the integrity of the scoring process. Therefore, athletes should run smoothly during the competition, take off decisively and forcefully, take off at an appropriate angle and with a certain height; Beautiful posture in the air, tumbling and turning quickly; When a person dives, his body is perpendicular to the water surface, and the smaller the splash, the better. Yu Fen said: "In fact, from the moment an athlete appears, the referee begins to score his temperament, including every detail of the completion of the action. From the training, we require athletes to do every detail in order to conquer the referee in the official competition. "

　　■ knowledge post

　　Introduction action "jumping popsicle"

　　It’s hard to dance well.

　　It is said that some people accidentally discovered in the "popsicle" diving that it is better to use the soles of their feet instead of stretching their toes, so they brought water impact’s splash pressing technology. And "popsicle" is just the enlightenment action of zero-based diving. You don’t need to stand upside down, just straighten up and jump into the water. This action is easy to say, and it takes time and energy to train it well. As Yu Fen, head coach of Tsinghua University Diving Team, said: Diving is a sport in which people exert their control over their bodies to the extreme.

　　The correct posture of "popsicle" diving is: standing in front of the platform, arms open and body in a T-shape; At the moment of jumping out of the platform, your feet should be off the ground at the same time, your arms should be lifted up and your body should be y-shaped; When entering the water, the arm should draw an O-shape in the air, and finally put the arm close to the thigh and enter the water. The whole action is completed in a few seconds, and you also need to control your body. In the star diving programs in the previous two years, the zero-based stars were in a lot of situations when they completed this basic movement, and even appeared "slamming the door", that is, the body slammed into the water. If you don’t control your limbs properly, you are most likely to break the door panel, causing bruises and redness. Some experts have analyzed that if you fall into the water from a 10-meter platform, it is equivalent to falling vertically from a height of 1 meter on the plastic playground.

　　At the same time, the stars participating in the program are all adults, and even tall models. The selection of materials for diving enlightenment training requires moderate height, small pelvis and light body. It was only after the full development that I began to contact diving, and the star diving program was really beyond my power.

　　On March 12 th, United Airlines has requestedStop producing the 737 MAX 10 aircraft for it, and switch to smaller models and Airbus A321 aircraft until the 737 MAX 10 passes the long-delayed certification.

　　United Airlines CEO Scott Kirby is on the 12 thThe investor conference said: "We have asked to stop manufacturing 737 MAX 10 for us, and they have already done so. We also asked Boeing to start manufacturing MAX 9 … When MAX 10 was certified, it is still uncertain. "

　　Kirby said that once the MAX 10 is licensed, United Airlines will switch back to using this aircraft. Kirby also confirmed earlier media reports that United Airlines is seeking to replace some of its 277 MAX 10 orders with Airbus A321 aircraft. (Bloomberg)

　　"Buying electricity card" has been neutral in the drought-resistant and seedling-protecting war in some towns and villages. Dagong Business Daily reporter Hu Zhiqiang/photo

　　Henan urgently applied for calling "rain-increasing aircraft"

　　The deputy director of the Provincial Meteorological Bureau communicated with netizens online, saying that the "rain-increasing aircraft" could be in place in the middle of this month, and artificial rainfall and snow could be carried out when the time was ripe.

　　■ Business Daily reporter Guo Fushou

　　In the face of this year’s severe drought, meteorological stations at all levels in our province have used high technology-a new generation of weather radar to monitor weather changes. In the middle of this month, "rain-increasing aircraft" can also be put in place.

　　Yesterday afternoon, Zhao Guoqiang, deputy director of the Provincial Meteorological Bureau, visited the portal website of the provincial government and the live broadcast room of Dahe. com, and exchanged views with netizens on issues such as "fighting drought with all efforts to protect seedlings and win a bumper harvest".

　　A new generation of weather radar helps drought resistance

　　"After the drought, meteorological departments at all levels in the province have been closely monitoring the weather changes, and a new generation of weather radar is on.

　　Zhao Guoqiang said that they have also strengthened drought monitoring and satellite remote sensing monitoring.

　　Since February 3, 2009, the precipitation and precipitation infiltration depth have been observed intensively. According to the monitoring and analysis, the Provincial Meteorological Bureau issued an orange warning signal for drought on January 7, and upgraded the drought warning to red on January 29, prompting relevant departments and units to do emergency work to prevent drought, and also providing meteorological basis for the provincial party committee and government to organize leaders to carry out drought-resistant wheat watering work.

　　580 shells and rockets to alleviate drought

　　"According to the arrangement of the Provincial Meteorological Bureau, all parts of the province have inspected anti-aircraft guns, rocket launchers and other equipment that carry out weather modification operations. On the first day of work after the holiday on February 1, a special person and a special car were sent to Luoyang and Jiaozuo. " Zhao Guoqiang said.

　　On the night of February 1st, the artificial influence workers in Sanmenxia, Luoyang, Jiyuan, Jiaozuo, Anyang and other cities stuck to the gun point, and timely carried out ground anti-aircraft guns and rockets to artificially increase rainfall and snow. A total of 18 anti-aircraft guns and 26 rockets were dispatched, and 400 shells and 180 rockets were fired. As of 08: 00 on February 2, there was light rain and snow in the affected area, which alleviated the drought to some extent and reduced the fire risk level of the forest area.

　　The "rain enhancement plane" can be put in place in the middle of this month.

　　Zhao Guoqiang said that according to the requirements of the provincial party committee and government, the Provincial Meteorological Bureau formed the 12th supervision team led by the bureau leaders to guide the work of drought-resistant wheat watering in Puyang. At the same time, the relevant business units of the Provincial Meteorological Bureau and the meteorological bureaus of provinces and municipalities also sent experts, technicians and mobile soil moisture measuring instruments to the fields to provide technical guidance and on-site services for farmers.

　　"Not only that, but also urgently call the rain-increasing aircraft." Zhao Guoqiang introduced that he was also actively in contact with the Air Force Department on matters related to the early adjustment of aircraft. On February 3rd, the letter from the provincial government to apply for a rain-increasing plane from the Air Division has been delivered by a special person. It is expected that the rain-increasing plane will be in place in the middle of this month.

　　Credit card irrigation makes great contributions. Farmers look forward to "well-to-well communication"

　　■ Business reporter Hu Zhiqiang correspondent Sean

　　It saves money and effort to water the land and swipe the card. In the face of the once-in-50-year drought in the whole province, farmers’ friends have a heartfelt heart: the grassroots need benefits like "well-connected".

　　Farmers can water the land by swiping their cards.

　　Yesterday morning, Meng Yongsheng, a villager from Menglou Village, Xilingsi Town, Sui County, came to the transformer room at the east end of the village. He pushed on the knife, took out a card from his coat pocket, pointed it at the electric meter, and only heard a bang, "It’s time to water the ground …" Meng Yongsheng ran to his wheat field with a smile. At this time, the plastic pipe in the ground had already come out.

　　Meng Yongsheng said that before the "well-to-well connection" project was realized, it would take him half a day to pour it back to the ground.

　　Meng Yongsheng’s "well-to-well connection" project is a pilot project for the state to support key agricultural power projects. Meng Xiande, secretary of the Party branch of the village, said that at present, more than 800 mu of wheat in the village has been watered. If it is not the "Jingjingtong" project, I am afraid that many farmers will be worried about the lack of power lines and meters.

　　Save labor, time and land.

　　Li Xiangyu, director of the production planning department of Suixian Power Supply Company, introduced that the "well-to-well connection" project is also called "platform area", which refers to the well area controlled by a transformer, and is referred to as "platform area" for short. In the implementation of this project, there is no wire post in the wheat field, and the land can be watered by swiping the card. His benefits are not only labor-saving, time-saving but also land-saving.

　　In the implementation, the cable is buried more than 1 meter deep underground, so that the line loss is greatly reduced without wind and rain; Secondly, the outdoor transformer is seriously stolen, the transformer is installed indoors, and the door is equipped with monitoring and alarm equipment, which can effectively prevent theft.

　　Li Xiangyu introduced that the company invested a total of 4.95 million yuan last year. At present, there are 34 "well-to-well" projects in the county, benefiting more than 23,000 mu of cultivated land in this year’s drought relief work.

　　The small card introduced by Li Xiangyu is the "IC" card. You can pay the electricity fee to the Dianguanzhan for recharging. After watering the land every time, you can swipe your card again, which shows the electricity consumption and balance of farmers. At the same time, the machine will automatically settle according to the charging standard stipulated by the state.

　　I look forward to more investment in these projects.

　　"I don’t know, I’m scared." This is a proverb in eastern Henan. In the past two days, the Business Daily reporter visited four townships in Sui County. Whether there is a village committee of the "Jingjingtong" project, the growth of wheat seedlings can be described as two days.

　　Under the background of the same drought year, in the implementation area of the "Jingjingtong" project in Menglou Village of Xilingsi Town, the growth of wheat seedlings is generally better than that of other village committees. Jiangang Township is a township with good soil quality in Sui County, and Yanzhuang Village in this township is also a beneficiary village of "well-connected". Yesterday afternoon, villager Ding Baoquan watered his own wheat for the second time, and at the same time, he applied fertilizer first, which effectively enhanced the growth of wheat seedlings.

　　Compared with the village committee with the "Jingjingtong" project, Wang Peichu, a villager in Li Dazhuang, Xilingsi Town, has a strong desire for "Jingjingtong". He said that if there is this project this year, he and other villagers will respond positively.

　　In response to farmers’ voices, Li Xiangyu said that in recent years, the state has increased its investment in power infrastructure. If the funds allocated by higher authorities are normal, the county needs more than 1,300 "stations", and the transformation task can be completed in two to three years.

　　"By then, farmers in the county can water their crops with their credit cards." Li Xiangyu said.

　　Yellow River Defense General:

　　Stop the Yellow River from cutting off.

　　Business News (Reporter Guo Fushou) Due to the severe drought in Henan, Shanxi, Shaanxi and Shandong provinces, the Yellow River Flood Control and Drought Relief Headquarters (Yellow River Flood Control Headquarters) held an emergency meeting and issued instructions to support drought relief in the basin to ensure the safety of the Yellow River’s ice prevention, drinking water safety and food safety in the Yellow River water supply area, and ensure the continuous flow of the Yellow River.

　　Xiaolangdi adjustable water quantity

　　Half less than the same period last year.

　　Yesterday, news came from the Yellow River Committee that the Yellow River Flood Control and Drought Relief Headquarters held an emergency special meeting on drought relief. In the case that the main stream of the Yellow River is dry, it is necessary to do everything possible to raise water sources to support the drought relief in the basin provinces.

　　According to the latest hydrological data, from November last year to January this year, the inflow of water from the main inflow areas of the Yellow River Basin was 5.244 billion cubic meters, 13% less than the multi-year average, of which 950 million cubic meters came from the middle reaches of the Yellow River, 51% less than the multi-year average; The downstream inflow was 141 million cubic meters, 76% less than the multi-year average. Affected by the continuous drought, the adjustable water volume of Xiaolangdi Reservoir in the Yellow River is only 1.71 billion cubic meters, 1.74 billion cubic meters less than the same period last year.

　　"In order to support drought resistance in Henan, Shandong and other provinces, the Yellow River Flood Control and Drought Relief Headquarters strengthened consultations, closely tracked the development of downstream ice conditions and droughts, and scientifically dispatched and increased water consumption indicators in time when the incoming water was dry." The relevant person in charge of the Yellow River Committee said that it is necessary to ensure the safety of the Yellow River against ice, the safety of drinking water and food in the Yellow River water supply area, and ensure the continuous flow of the Yellow River.

　　Issue an orange warning of drought

　　The reporter also learned that in view of the severe drought in several provinces in the Yellow River Basin, especially in Shanxi, Shaanxi, Henan and Shandong provinces, according to the provisions of the Yellow River Basin Drought Relief Plan (Trial), the Yellow River Defense General has further upgraded the warning level. From now on, the regional drought in the Yellow River Basin will be upgraded from a yellow warning to an orange warning, and a secondary emergency response will be launched.

　　Henan Yellow River Affairs Bureau:

　　It attracted 322 million cubic meters of Yellow River water.

　　Quench thirst of wheat in our province

　　Business News (Reporter Guo Fushou correspondent Zu Shibao Liu Tian) Yesterday, the reporter was informed that the Henan River Affairs Bureau held an emergency meeting on drought-resistant wheat irrigation on the 3 rd, proposing to make full use of the Yellow River water and go all out to ensure the demand for drought-resistant wheat irrigation in Henan along the Yellow River.

　　Niu Yuguo, deputy commander of the Flood Control and Drought Relief Headquarters of Henan Province and director of the Yellow River Affairs Bureau of Henan Province, said that from November last year to January this year, more than 20 sluice gates for diverting water from the Yellow River were opened one after another, and the cumulative water supply to Henan along the Yellow River was 316 million cubic meters. The maximum daily water intake for drought-resistant wheat irrigation reached 130 cubic meters per second. Among them, the emergency water diversion in January was 162 million cubic meters, which was 120 million cubic meters more than the same period of last year, which was the highest water diversion in the same period since 1980.

　　In January this year, our province diverted 162 million cubic meters of Yellow River water in an emergency, setting a new high for the same period since 1980. The Yellow River Affairs Bureau of Henan Province applied to the Yellow River Committee for a water plan to divert 322 million cubic meters of water to the Yellow River in February, with an average diversion flow of 133 cubic meters per second, which has been approved by the Yellow River Committee, the highest application and approval for the same period since 2000. This means that 322 million cubic meters of Yellow River water will be used to water wheat in our province. henan business daily

Editor: Yan Bin

　　Photo courtesy of vision china

　　Give you a heads-up

　　Every summer, all kinds of seemingly eloquent "popular science" are "listed" simultaneously with big and red cherries.

　　Recently, a video about the quality and safety of cherries spread on the Internet, saying that "99% of cherries on the market use swelling agents. Normal cherries can only grow to 12-mdash; The weight of 13 grams can be doubled with swelling agent. If there is no kernel in the cherry pit, the hollow one is medicated … …”

　　What is the swelling agent that is often named? Is there really a miraculous effect in the rumor? What factors are related to the size of the cherry? To this end, the reporter visited experts in the agricultural field and consulted people on issues of concern.

　　No food safety incidents caused by it have been found yet.

　　"The swelling agent is a plant growth regulator. In the process of cherry growth, in order to improve pollination rate and fruit setting rate, cherry planted in greenhouse usually needs to use swelling agent; Cherry cultivated in the open field does not need to be used. " Wang Qiang, a researcher at the Agricultural Products Quality and Safety Risk Assessment Laboratory (Hangzhou) of the Ministry of Agriculture and Rural Affairs, told the reporter that at present, open-field cherry is the mainstream cultivation mode in China. According to this calculation, it is indeed possible to use plant growth regulators such as bulking agents in cherry market, but the utilization rate should be less than 50%.

　　How do plant growth regulators play a role in the production of fruit and vegetable products?

　　"Plant growth regulators have similar effects to plant hormones, which can stimulate the division and growth of plant cells. The difference is that plant growth regulators are artificially synthesized by scientists and modified to make their activities stronger than plant hormones." Xu Dong Hui, a researcher at the Institute of Vegetables and Flowers of the Chinese Academy of Agricultural Sciences, said.

　　In terms of management, since 1997, according to the Regulations on Pesticide Management, plant growth regulators have been managed as pesticides.

　　According to the relevant person in charge of the Ministry of Agriculture and Rural Affairs, at present, there are nearly 40 registered plant growth regulators in China. There are more than 100 kinds registered and used internationally. Approved and registered plant growth regulators should formulate technical specifications for safe use, including medication period, dosage, application method, scope of use, matters needing attention and safety interval, and clearly mark them on product labels to guide farmers to use them reasonably. In addition, a series of residue tests should be carried out for registered products, and residue limit standards and reasonable use criteria should be formulated according to data such as residue tests to ensure the quality and safety of agricultural products. Since 2015, the Ministry of Agriculture and Rural Affairs has conducted a risk assessment of plant growth regulator residues in agricultural products, and the results show that the average residue value of plant growth regulators is only 0.001— 0.034 mg/kg, the risk of dietary exposure is very low, and the product quality and safety are guaranteed.

　　Experts said that in terms of safety, there have been no food safety incidents caused by plant growth regulator residues in the world so far. In China, agricultural products that have been applied with plant growth regulators are also very safe for consumers. Compared with other pesticides, although plant growth regulators are included in the management of pesticides, they are not pesticides for treating diseases, insects and weeding in the traditional sense. Their products are of low toxicity, and some of them are even listed as exempted substances without setting residue limits because they are almost nontoxic. For example, the toxicity of chlorfenuron commonly used in expanded fruits (LD50 > 4,918 mg/kg) is lower than that of salt (LD50 = 3,200 mg/kg). In addition, because the amount of plant growth regulator is small, excessive use is easy to produce adverse effects, and farmers can not use it in large quantities, so the residue of plant growth regulator is low.

　　Fruit size is determined by many factors.

　　Then, what factors are related to the size of cherry fruit, and can the swelling agent "double" the fruit?

　　According to experts, large cherry and seedless cherry are related to variety characteristics, cultivation measures and the use of plant growth regulators.

　　Xu Donghui told reporters that "Meizao" is the largest fruit among the cherry varieties at present. This variety of cherries has the characteristics of large fruit shape, full and sweet taste. Under normal circumstances, the single fruit weight of "Meizao" is 8-mdash; 12 grams, which can reach 16-mdash under special cultivation methods; Twenty grams.

　　"A sweet cherry variety selected in China ‘ Red light ’ Under normal circumstances, the weight of a single fruit can reach 11-mdash; Fifteen grams. From the point of view of drug control, it has been reported in literature that treating cherry with plant growth regulator gibberellic acid can increase the weight of single fruit by about 15%— 30%, the swelling effect is limited. " Wang Qiang said.

　　So, does cherry seedless mean that it has been treated with swelling agent? Wang Qiang said, this statement is too absolute. Although it is reported in the literature that cherry stones will be hollow after being treated with gibberellic acid at a certain concentration, it is not necessarily 100% seedless after being treated with gibberellic acid at a low concentration. In addition, the causes of cherry hollowness are natural abortion or other possibilities, not necessarily because of the use of gibberellic acid and other drugs.

　　Xu Donghui explained that in order to improve the pollination rate and fruit setting rate of cherries, fruit farmers will apply gibberellin and other plant growth regulators at flowering stage, which may also cause seedless fruits and nuts, but this will not affect the safety of cherries.

What is the subject English major for adult undergraduates? Many students are very concerned about this issue, so let’s take a look at it with China Education Online Continuing Education Xiaobian. You will have a deeper understanding through the following articles.

English major examination subjects for adult undergraduates

The examination subjects of English major in adult college entrance examination are different because of different levels of application, among which the examination subjects of English major in adult college entrance examination are Chinese, foreign language, mathematics (literature) and history and geography; The subjects of adult college entrance examination for English majors are politics, foreign languages and college Chinese.

Employment direction of English major in adult college entrance examination

Candidates majoring in English in adult college entrance examination can engage in interpretation and translation in foreign trade, foreign trade, tourism and foreign affairs, as well as management, secretarial, economic and trade work in various enterprises and institutions.

Candidates majoring in English in adult college entrance examination can also engage in teaching and scientific research in middle schools, technical secondary schools, vocational high schools, technical schools and English language training centers, colleges and scientific research departments.

In addition to employment, adult college entrance examination candidates majoring in business English have relatively more opportunities to go abroad, which shows that adult college entrance examination English major is worth applying for.

What materials do you need to apply for the adult college entrance examination?

1 adult college entrance examination candidates’ ID cards and their copies and academic credentials;

2. Adult college entrance examination candidates from other provinces need to provide local residence permits, work unit vouchers and other materials;

3. Applying for the adult college entrance examination medical major requires the issuance of counterpart certificates, as well as relevant academic qualifications or qualification certificates;

4. Candidates who meet the conditions of extra points for adult college entrance examination care need to bring the original and photocopy of relevant vouchers.

Xiaobian’s introduction to "English major for adult undergraduates" ends here. I hope the above content can help everyone. If you want to know more about the entrance examination, please consult China Education Online Continuing Education Channel.

If the fruit circle is going to make a biography of Zhen Huan, then pineapples and pineapples will be the essential protagonists in this palace fight drama.

For a long time, the debate about whether they are the same fruit has never stopped. Open the search engine and enter the words "pineapple and pineapple" to find 5.95 million pieces of information.

You can find 5.95 million pieces of information by typing the words "pineapple and pineapple" in the search engine.

Image source: Google

In the camp of "not the same fruit", supporters list the differences between pineapple and pineapple in every detail, for example, pineapple has fewer thorns, does not need to dig trenches, does not need to be soaked in salt water, and is more noble than pineapple (no, the pineapple party refuses).

The other camp believes that pineapple is actually a pineapple, and the two are like tomatoes and tomatoes, potatoes and potatoes.

So, what is the relationship between pineapples and pineapples on the market?

The dispute between pineapple and pineapple is actually an "infighting"

To understand this puzzle that has puzzled the fruit circle for a long time, we must first talk about the pineapple family.

According to the "Flora of China", the common name of pineapple is pineapple.

Botanically speaking, they are the same plant of the genus Bromeliaceae.

There are more than 2,000 employees in 45 genera in this "department" of Bromeliaceae, among which only one species of pineapple has economic cultivation value, and the rest have become ornamental flowers.

Potatoes, perennial evergreen herbaceous pulpy plants of bromeliaceae.

Image source: Station Cool Hailuo

In 1935, there were 135 recorded pineapple varieties. According to the characteristics of fruits, they can be divided into four categories: Cayenne Group, Queen Group, Spanish Group and hybrid group.

If you go to a supermarket or a fruit shop to buy pineapple, you will probably buy a queen variety called Bali.

In 2015, about 80% of the main pineapple producing areas in Chinese mainland were cultivated in Bali.

Its leaves are a little prickly, and it will prick your hand. If you cut it open, you will find many black round fruit eyes, which are actually the stigma and stamens left in the pulp of pineapple.

After removing them, you can eat only about 57% of the pulp.

Image source: Station Cool Hailuo

If you are persuaded by Bali pineapple and want to switch to "pineapple", then the clerk may recommend some special varieties to you, such as golden diamond pineapple, perfume pineapple, peeled pineapple and so on, but they are actually different members of the pineapple family.

Take Golden Diamond Pineapple as an example, it is a hybrid variety bred in Taiwan Province area, numbered Tainong 17. In 2018, 85% of the pineapples cultivated in Taiwan Province were golden diamonds.

Image source: Station Cool Hailuo

Its size is one or two times larger than that of Bali, but its fruit eye is only half as deep as that of Bali. After cutting the peel, it can be eaten directly, with a crisp taste and overflowing juice.

Because the bromelain content in golden diamond pineapple is relatively low, it won’t sting too much when eaten.

However, its excellent taste and quality also mean that you need to pay more money to take it home. For example, in Baiguoyuan, a chain fruit shop, the price of an A-grade Bali pineapple is about 13.5 ~ 15.8 yuan/kg, while the price of a golden diamond pineapple of the same level is 42 ~ 45 yuan/kg.

　　February 9th is the traditional Lantern Festival. Folklore experts said that as one of the important traditional festivals in China, the Lantern Festival has a history of more than 2,000 years, and its excitement can be called the "carnival" of the Chinese nation.

　　Zhao Zhi Heng, an expert in Tianjin folklore, said that according to the China lunar calendar, the same date of the sun and the moon’s yellow meridian is the first day of January, when the sun, the moon and the earth are generally in a straight line. The first month is January, and the ancients called the night "Xiao". The fifteenth day of January is the first full moon night in the traditional lunar year, so it is called the Lantern Festival, also known as "Shangyuan Festival".

　　According to the folk tradition in China, on the festival night in spring returns, the moon is high in the sky, and there are thousands of lanterns on the ground. People watch lanterns, solve riddles on the lanterns, eat Yuanxiao and have a family reunion, which makes them happy.

　　Wang Sichao, a researcher at Purple Mountain Observatory of Chinese Academy of Sciences, said that Lantern Festival has a history of at least 2,000 years in China. Legend has it that after the Western Han Dynasty put down the "Zhulu Rebellion", Emperor Wen of Han deeply felt that peace and prosperity were hard-won, so he designated the fifteenth day of the first month of the rebellion as the day of having fun with the people.

　　Emperor Han Ming of East China advocated Buddhism. He heard that monks lit lamps to worship Buddha on the fifteenth day of the first month of Buddhism, so he ordered the palace temples to light lamps to worship Buddha that night, and ordered the gentry and ordinary people to hang lamps. Since then, the Lantern Festival has gradually formed a grand festival.

　　Folklore experts say that New Year’s Eve and the first day of the first month are traditionally celebrated by families, while the Lantern Festival is about going out of the house to have fun with the whole world, which is the only festival with "noisy" as its core content. As the saying goes, "the fifteenth day of the first month is noisy." The word "Noisy" shows the exultation and excitement of the Lantern Festival, and also shows the differences between the Lantern Festival and other festivals.

　　Folklore experts say that Lantern Festival is popular, and fireworks are also indispensable. In addition to lights, more prominent activities are all kinds of community fires, such as lion dancing, dragon lantern playing, roller boating, walking on stilts, drum beating and yangko dancing, which are played every year and are popular. The Lantern Festival can be said to be a carnival in China. Its customs and activities are more varied and colorful in traditional festivals in China.

Editor: Liu Li