上海私人品茶

　　An Admission Notice was sent to the freshmen of Zhejiang University with the admission notice. The Admission Notice reminded the freshmen to complete the Advanced Mathematics Prerequisite before reporting for duty. This course consists of 12 chapters and is open to the whole network on the MOOC platform of China University.

　　Not long ago, the Ministry of Science and Technology, the Ministry of Education, the Chinese Academy of Sciences, and the Natural Science Foundation of China jointly issued the Work Plan on Strengthening Mathematical Science Research, demanding that mathematical science research be strengthened and basic mathematical science be continuously and stably supported.

　　One is to remind students to pay attention to mathematics again before freshmen enter school. One is that the state has issued a policy document to guide the development of a specific discipline.

　　People can’t help wondering, do Chinese students have a solid foundation in mathematics? What about the overall mathematical literacy? What kind of situation does mathematics education, which is related to national development, face? Is there a problem in the connection of mathematics teaching?

　　"Almost all the students are studying math hard."

　　"Mathematics is my shortcoming. I have been making up mathematics since I started studying mathematics." Xinran is a senior three student in Beijing. In this summer vacation, which lasted just one month, a 90-minute "one-on-one" math tutorial was waiting for her every day. Xinran told reporters that "almost all the students are desperately learning mathematics". In her classmate’s remedial course, mathematics has almost become a fixed choice, plus other subjects.

　　Whether a subject is valued or not can always be explained by the popularity of training institutions. The reporter’s investigation found that mathematics can always occupy a place in the popular subjects of training institutions.

　　"Mathematics is a rigid demand, and there are always many people who sign up." Li Xiangyang, an enrollment teacher of a national chain training institution in Beijing, told the reporter that mathematics training is generally divided into class classes and "one-on-one" tutoring. "There are 5 to 8 people in each class, with a period of 12 days. There are three classes in the summer vacation, which are full half a month before the start of the class. Parents usually register their children in advance." Take the summer class from Grade One to Grade Two as an example. After three days of "reviewing old things", nine days of "learning new things" and 12 days of class, the students’ learning progress just matches the mid-term of normal school teaching. In other words, the summer vacation focused on previewing all the knowledge before the mid-term exam.

　　Even in the summer vacation, why are so many people "keen" on learning mathematics?

　　天津市某重点中学数学教师陈开达解释：“每次月考成绩都可以看出来，拉开分数最多的就是数学。”数学科目的重要性总是与分数联系在一起。

　　数学难度大，但可以拉开分数差距，不管在中小学，还是大学阶段，数学总让学生犯难。

　　武汉大学工学部学生胡易告诉记者，刚入学学习微积分时“十分吃力”，大学数学需要记忆的知识点并不多，新型题也不多，综合考察的是空间能力与数形结合能力。“大学数学课时间紧，内容多，节奏快，要考出好成绩还是得靠自己平时多做题”。因此，数学复习总是会占用胡易不少时间。

　　数学家开尔文曾告诫世人，别把数学想象得艰难晦涩，不可捉摸，它只不过是常识的升华而已。但是，在一些学生眼里，数学枯燥、深奥，甚至无用而无聊。

　　数学底子厚实，但是创新能力欠缺

　　不久前，邓明扬等6位代表中国重登国际数学奥林匹克竞赛（IMO）冠军宝座的少年载誉回国。在这次全球最负盛名的中学生数学竞赛，中国代表队以227分的总成绩与美国队并列世界第一。

　　在本次比赛中，中国诞生了两名满分选手，且6名队员均摘得金牌，这也是8年来中国队员再次全部摘金。自1985年算起，中国共获得20次团体第一，在各国的参赛队伍中遥遥领先。

　　"Chinese students have a high level of mathematics and outstanding students are concentrated. On the whole, compared with other countries, China’s mathematics education level is also among the best. " Lu Linhai, a professor at Nanjing University, said.

　　The Report on the Quality Monitoring of Compulsory Education in China supports his judgment. According to the Report, 84.6% and 78.9% of the students in Grade Four and Grade Eight have reached the middle and above level in mathematics, and 23.8% and 26.7% have reached the excellent level respectively.

　　"Chinese students have a solid foundation in mathematics, but there is a lack of innovation and creation in mathematics literacy," said Zhang Weizhong, a professor at Zhejiang Normal University. Many children get together to learn Olympic Mathematics, but they only study for the advantage of further studies. Some training institutions also mislead students and parents, equating mathematics learning with sea tactics and difficult calculations. "As a result, some students who achieved good results in mathematics in basic education gradually lost interest in mathematics when they grew up."

　　PISA survey found that Shanghai students spend about 35 hours in and out of class every week, more than 10 hours in the United States and Finland. That is to say, China students’ ability to take exams in mathematics is very strong, but this is at the cost of losing their confidence in learning and increasing their intensive study time. This survey is an extensive test of the Organization for Economic Cooperation and Development (OECD) for students aged 15-16 in mathematics, reading and science and technology.

　　Understand mathematics in an all-round way and feel its charm

　　It is mentioned in the Work Plan on Strengthening Mathematical Science Research that the strength of mathematics often affects the strength of a country, and almost all major discoveries are related to the development and progress of mathematics. Mathematics has become an indispensable and important support in the fields of aerospace, national defense security, biomedicine, information, energy, ocean, artificial intelligence and advanced manufacturing.

　　Ren Zhengfei, founder and president of Huawei, once publicly stated: "In fact, our real breakthrough is mathematics, and mobile phones and system equipment are centered on mathematics." At present, Huawei has 20 research centers around the world, with more than 700 mathematicians, more than 800 physicists and more than 120 chemists.

　　Mathematics is not only related to the development of major areas of the country, but also regarded as the basic literacy of citizens in modern society.

　　"Mathematics education and mathematics science research are relatively independent, but they are also related." Zhang Weizhong said that mathematics education is the foundation and support of mathematics research. The study of mathematical knowledge lays a knowledge foundation for students to carry out mathematical research in the future; Mathematical abstraction, logical reasoning, mathematical modeling and intuitive imagination, which are commonly used in mathematical learning, are the methodological basis of mathematical research; The promotion of mathematics teaching to students’ rational thinking level, scientific spirit development and rigorous and realistic attitude is the literacy basis for mathematical scientific research.

　　"Although the achievements of China students in the Olympic Mathematics and other fields are obvious to all," Lu Linhai said, "China’s mathematics education has not produced the top students". Compared with the number of winners of these Olympic Games, their achievements in scientific research and their contribution to the development of mathematics in the world have almost never attracted attention. What is the reason for it

　　A comparative data of Chinese and American students’ mathematical ability shows that China students are 40% higher than their American peers in solving calculation problems, 22% higher in solving simple problems, more than 20% higher in solving complex problems with limited process, and 4% lower in solving complex problems with open process.

　　Lv Linhai analyzed that some China students often deviate from cultural attributes to learn mathematics, and regard mathematics as a calculation skill and an examination tool, which easily leads to "separation" between learning and application.

　　"Different cultural backgrounds lead to great differences in mathematical thinking between China children and Western children." Lv Linhai added that in China’s examination system, the development goal of mathematics for students is to get high marks, which "embodies utilitarian function rather than rational thinking". He suggested that in order to create a good scientific research environment, respect the laws of mathematics and make a group of outstanding mathematicians stand out, it is necessary to let more students fully understand mathematics and feel its charm.

[car home Jinzhou Preferential Promotion Channel] At present, substantial preferential activities are being carried out in Jinzhou market. The highest discount reached 85,900 yuan, and the lowest starting price was only 344,000 yuan. If you are interested in this electric car, you can click "Check the car price" in the quotation form to get a higher discount.

The exterior design of BMW i4 is full of dynamic and technological sense, and the front face adopts a closed kidney-shaped air intake grille, which, combined with the sharp headlight group, highlights the unique style of the car. The body lines are smooth, and the tail design is simple and fashionable. On the whole, the appearance of BMW i4 not only reflects the high-end quality of luxury brands, but also shows the futuristic feeling of new energy vehicles.

BMW i4 has a slender body with length, width and height of 4785mm, 1852mm and 1455mm respectively, and a wheelbase of 2856mm, showing elegant body proportion and spacious interior space. The front tread is 1601mm and the rear tread is 1630mm, which provides excellent stability and handling for the vehicle. The side lines of the car are smooth and dynamic, equipped with 18-inch rims, and the front wheels are made of 245/45 R18 tires, while the rear wheels are made of 255/45 R18 tires, which further demonstrates the sports style of the car.

The interior design of BMW i4 is mainly in sports and scientific style, and high-quality imitation leather, genuine leather and leather /Alcantara mixed materials are used in the car to create a luxurious and comfortable riding environment. The steering wheel is wrapped in leather and has the function of manual up-and-down and forward-and-backward adjustment to ensure that the driver can find the best driving posture. The center console is equipped with a 14.9-inch central control panel, which supports voice recognition control systems such as multimedia system, navigation, telephone and air conditioning, providing drivers with a convenient operating experience. The front row and the rear row are equipped with 2 USB ports and 2 Type-C ports respectively to meet the charging needs of passengers. In addition, the front seats are also equipped with heating function to further enhance driving comfort. Both the main seat and the auxiliary seat of BMW i4 support the functions of front and rear adjustment, backrest adjustment, height adjustment, leg rest adjustment and lumbar support, so as to ensure that every passenger can maintain a comfortable sitting position during long-distance driving.

The motor of BMW i4 has the maximum power of 210kW and the maximum torque of 400 Nm, which provides the vehicle with strong power performance and excellent acceleration performance.

The owner of car home said: "The configuration parameters of Series I’s 3, 5 and X3 are almost the same, except that the shell has been changed. I want to buy the I4 for more than 100,000 yuan. Of course, it is still imported, so there is no need to do such a thing as buying it home and deducting the label. At first glance, the big nostrils are not mediocre. When I drive out, people are guessing at 600,000. I am sorry. "

In the process of driving Volkswagen’s new Magotan, the replacement frequency of coolant and the antifreeze selected are very important.

According to the official suggestion, G13 purple antifreeze should be replaced every two years or 30,000 kilometers, and the market retail price is about 110 yuan /5L. Antifreeze is not distinguished by brand, but by its color, which is usually red, green and yellow. Magotan usually needs to add about 5 liters, up to 8 liters at most, to keep the cooling system running normally.

For Magotan, the original FAW-Volkswagen antifreeze is enough, and it is usually replaced every 2 years or 60,000 kilometers. Unless there is water leakage, it is generally not necessary to add it frequently. Just add a small amount of water to supplement it when necessary, and the main mission of antifreeze is to protect the safe operation of the engine in low temperature environment and provide efficient heat dissipation.

The standard time for replacing antifreeze is about every two years or 60 thousand kilometers. There are two ways to judge whether it needs to be replaced: First, through visual inspection, if the antifreeze appears black, it means that it may have begun to deteriorate and needs to be replaced in time. The second is to follow the manufacturer’s suggestions to ensure that its performance always meets the standards.

For Magotan, it is very important to follow the replacement cycle of antifreeze. Expired antifreeze may cause internal corrosion of the engine and even cause serious damage. During use, be sure to avoid mixing it with tap water to ensure the best performance.

Finally, when Magotan replaces antifreeze, according to the instructions of the coolant pot in the engine compartment, it is usually necessary to add about 5 liters and keep it within the maximum and minimum scale range. In this way, your car can be kept in the best cooling state.

Hongbao Resources (01131) announced that on December 14, 2016, the Group completed the acquisition of a biodiesel plant in Arkansas, USA through a subsidiary, at a cost of US$ 2.97 million.

Immediately after the completion of the acquisition, the Group and Solfuels Holdings Pte
Ltd. will beneficially own 51% and 49% of the rights and interests of the biodiesel plant respectively. The biodiesel plant has an annual production capacity of 137,000 metric tons and is expected to be put into operation in April 2017.

The Group is a supplier of integrated energy and shipping solutions, and Solfuels is a leading and experienced biofuel operator, operating a biodiesel plant in the United States. The acquisition marks the first time that the Group has entered the field of renewable energy.

According to the company, with Solfuels’ operational expertise, the group expects to transform the biodiesel plant to adapt to a variety of plateau materials, including yellow oil, animal fat, inedible corn oil and refined vegetable oil, and reduce production costs. The group believes that the production of this biodiesel plant will meet the increasing demand for renewable energy in the US market.

The ability of the Three Sheep Group to become bigger and stronger is not only related to the efforts and struggles of Brother Yang, but also inseparable from the hard work of their apprentices. From the current perspective, during the ribbon-cutting ceremony, Brother Yang brought 4 apprentices and his family to cut the ribbon together, and did not invite all the star Internet celebrities to attend. Letting the apprentices cut the ribbon together also has the feeling of opening their own company, and they can more invest in the development of the company as their own business.

Xiao Yang said that the original intention of founding the Three Sheep Company was to better serve the society, and the construction of the eastern center is to achieve this goal. While driving the local economy, it also provides more employment opportunities for people.

In addition, the existence of the Eastern Center will further extend the accuracy and efficiency of Sangyang in data-based management and intelligent decision-making, and provide more possibilities for the data generation of all large mid-platform of Sangyang Group in the future. For Sangyang Group, the opening of the Eastern Center is not only an important milestone, but also an important driving force for the development of its digital economy.

2024 models as low as only 15 (subsidized).

Hundreds of thousands can have hundreds of thousands of configurations, but there is electricity to extend the range, which is called by millions of netizens as the price butcher of high-end new energy.

The length of the car is 4915, the wheelbase is 2825, and it has a six-seat layout. The interior adopts an environmentally friendly cockpit, the central control is equipped with a 14.6-inch 2.5k floating central control screen, built-in 8295 chip, and the rear row provides a 15.6-inch rear entertainment screen. At the same time, some models are equipped with.

In terms of power, it provides two kinds of power: pure electric and range extension, with a full battery life of 520 kilometers. It is worth mentioning that the leading 416 pure electric board is standard with all 800 volts carbonized into a high-voltage platform, and the power is charged from 30% to 80%, and it only takes 15 minutes at the fastest. The range extension version is equipped with a 1.5-liter four-cylinder range extender, with a pure electric range of 200 kilometers and a comprehensive range of 1,095 kilometers.

In terms of price, the entry-level extended range 200 Smart Edition has a discounted landing price of around 150,000 yuan, while the pure electric entry-level 500 Smart Edition has a landing price of around 157,000 yuan. If your budget is in the price range of 150,000 to 200,000 yuan, then it is worth considering leading 416.

Time: 10: 00 on May 21st, 2020.

Venue: Lianyungang Press Conference Hall

Moderator: Yang Yan, Deputy Director of Party Group Work Department of Lianyungang Maritime Safety Administration

Publisher: Bao Jilai, deputy director and spokesperson of Lianyungang Maritime Safety Administration; Yin Wenwei, vice chairman of guannan county CPPCC and director of Transportation Bureau; Wu Xiaojun, deputy director of Lianyungang Guanhe Maritime Department.

Issue: Introduce the cancellation of ferry in Guanhe area of Lianyungang Maritime Safety Administration.

Yang Yan: Good morning, ladies and gentlemen, friends of the news media!

Today, we held a press conference on "Cancellation of Ferry in Guanhe Jurisdiction of Lianyungang Maritime Safety Administration" in Lianyungang Press Hall.

Attending the conference were Bao Jilai, deputy director and spokesman of Lianyungang Maritime Safety Administration, Yin Wenwei, vice chairman of Lianyungang guannan county CPPCC and director of the Transportation Bureau, and Wu Xiaojun, deputy director of Lianyungang Guanhe Marine Department. They will tell you about the cancellation of the ferry in Guanhe area of Lianyungang Maritime Safety Administration and answer questions that media friends are interested in.

I am Yang Yan, deputy director of the Party Group Work Department of Lianyungang Maritime Safety Administration, and today’s press conference is presided over by me.

Today, we are fortunate to have invited Xinhua Daily, Xinhuanet, Yangzi Evening News, Modern Express, Netease News, Lianyungang Radio Station, Lianyungang TV Station, Lianyungang Daily, Cangwu Evening News, Lianyungang Publishing and other media friends. Welcome to the conference!

First of all, please invite Comrade Bao Jilai, deputy director and spokesman of Lianyungang Maritime Safety Administration, to make a press release.

Bao Jilai: Good morning, leaders, guests and friends from the press!

Today, we are here to hold a press conference on the cancellation of the ferry in Guanhe jurisdiction of Lianyungang Maritime Safety Administration. Here, on behalf of Lianyungang Maritime Safety Administration, I would like to extend a warm welcome to the friends from the press attending the meeting! At the same time, I would also like to express my heartfelt thanks to all sectors of society who have long cared about and supported Lianyungang’s maritime development!

In 2019, the evacuation of four crossing lines in Guanhe area was officially started. Up to now, all ferries have completed the examination and approval of ferry cancellation, and the ferry lines under the jurisdiction of Lianyungang Maritime Safety Administration have all been cancelled. The ferry operation in the jurisdiction has completed its historical mission and the ferry trip has come to a successful end.

The evacuation work is related to people’s travel, and we must uphold a prudent and scientific attitude. The four crossing lines of Guanhe River were set up in the early 1990s, which once carried the heavy burden of communication between residents on both sides of Guanhe River. With the development of land traffic, the increase of ship traffic flow on the water and the aging of ferries, ferry trips have not adapted to the current situation and become a major risk threatening the water traffic safety in Guanhe waters. In order to ensure the safety of people’s lives and property, under the leadership of the people’s governments of guannan county and Xiangshui County, the competent departments of the county people’s government, the township people’s government where the ferry is located and the maritime administrative department have coordinated and promoted, and now the approval has been revoked. The ferry boarding facilities will be dismantled according to law, and the original ferry will be dismantled.

Here, we also call on residents on both sides of the strait to cooperate with the evacuation work, cherish their lives and put an end to private crossings.

Thank you!

Yang Yan: Thank you for the press release.

The following is a question-and-answer session. Please ask reporters and friends to ask questions on related issues.

Reporter: Hello, please briefly introduce the background of this ferry evacuation.

Wu Xiaojun: First of all, thank you for your concern about our work. I will answer this question.

There are four original ferry lines in Guanhe area of Lianyungang Maritime Bureau, namely Dazui-Chenjiagang ferry line, Jiudui-Dawan ferry line, Badui-Haian ferry line, and Sandui-Shuang Gang ferry line, with a total of eight ferries, which were set up in the early 1990s. At that time, apart from the Xiangshui 204 National Highway Bridge, no other bridges were erected in the lower reaches of Guanhe River, and the exchanges between residents on both sides of the strait mainly depended on ferries. Since the ferry lines were set up for nearly 30 years, they have been safely ferried for nearly 1,500 years.

The evacuation of the ferry is mainly due to the changes in the internal and external situations. First, with the rapid development of economy and society, many bridges such as Xiangshui 204 National Highway Bridge, Shenhai Expressway Guanhe Bridge, lianyungang-yancheng railway Guanhe Bridge and Guanjiangkou Bridge, which have basically met the travel needs of residents on both sides of the strait, are no longer an inevitable choice for residents on both sides of the strait to travel by ferry. Second, due to the effective management of the waterway in Guanhe Estuary and the continuous extension of the combined transport area between Guanhe River and Haihe River, the navigation environment of Guanhe River has changed greatly, and the trend of large-scale ships is obvious, and the traffic flow of ships has increased by orders of magnitude; Third, there are great security risks in the current ferry mode, such as the obvious aging of the ferry. In recent years, there are 349 hidden dangers of ferry safety detected by the maritime department alone, which seriously threatens the travel safety of people on both sides of the strait.

These changes in the internal and external situation have made the evacuation work very necessary and urgent.

Reporter: Hello, what supporting measures are there after the ferry is cancelled?

Yin Wenwei: Thank you for your question. I will answer this question.

After the ferry is cancelled, as the competent department of the industry, we will work with the maritime department and the township government where the ferry is located, relying on the supervision and coordination mechanism of the ferry withdrawal to jointly promote the follow-up work.

First, vigorously carry out publicity and mobilization. Through media release, posting the announcement of ferry suspension, etc., actively announce the ferry withdrawal information through multiple channels, and explain it to residents on both sides of the strait, calling on them to actively cooperate and guide them to take the initiative to choose land travel.

Second, continue to strengthen ferry supervision. Combined with the special rectification activities of safety production, we will continue to carry out inspections on the original ferry, increase the intensity and frequency of inspections, and resolutely put an end to the occurrence of private crossings.

The third is to dismantle the ferry facilities in an orderly manner. Timely follow-up work, including the cancellation of ferry households and the dismantling of ferry boarding facilities, will be done to ensure the orderly progress in accordance with the law and ensure the safety of people’s lives and property in the ferry area.

Thank you all.

Reporter: Hello, please briefly introduce the impact on the navigation safety of Guanhe waters after the evacuation.

Bao Jilai: Thank you for your question. I will answer this question.

It is obvious that the cancellation of ferry has brought favorable changes to the navigation environment. With the rapid economic development on both sides of Guanhe River, the navigation capacity and demand of Guanhe River have been greatly improved, and the port throughput and ship traffic flow have increased by orders of magnitude. With the demand of large-scale ships and fast navigation, the crossing of ferries poses a great threat to the navigation safety of passing ships, and the thrilling scene of "passing by" occurs from time to time. Once it cannot dodge, it will bring about dangerous accidents of group deaths and injuries. After the ferry is withdrawn, the ascending and descending ships are no longer worried about the crossing of the ferry, just as we are no longer worried about pedestrians and non-motor vehicles crossing the road when driving, so we can sail more quickly and safely, which not only improves the navigation efficiency in water areas, but also improves the water safety level.

Thank you.

Yang Yan: Thank you again for your introduction and answers, and thank you media friends for attending today’s press conference. Please contact our staff if you need to continue the interview.

This concludes today’s press conference. Thank you!