Water conservation questionnaire

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1 What is your awareness of saving water in your daily life?

A 8 is wrong, B is just so-so, C is poor

2 How long does it take you to take a shower?

A is less than 2mb2-4min c is more than 4min

3 Do you often have the golden idea of saving water?

A yes B no C I am not sure

4 What good suggestions do you have for saving water?

5 design a water-saving slogan

1: b

2: a

3: a

4 I hope everyone has the consciousness of saving water

5 Join hands to save water

1) How to save water in the bathroom?

1. Don't pour ash, leftovers and waste paper into the toilet and flush it with water.

2. install water-saving faucet in the shower, and choose a shorter shower without too long water pipe.

3. always check the tap and water pipe of the water pipe to see if there is water leakage.

(2) How to save water in the kitchen and laundry room?

1. Only use it when the automatic dishwasher is full of dishes to be washed.

2. When washing vegetables, don't turn on the tap all the time, but wash them in clean water first and then rinse them with water.

3. If you don't use a dishwasher to clean dishes and bowls, you shouldn't wash them directly with water. Put the tableware to be washed in one sink first, and then put it in another sink for quick washing.

(3) how to save water outdoors?

1. water the lawn only when it is necessary.

water in cool weather, and the best time for watering is early morning.

2. Plant drought-resistant grass or trees, and surround the trees or plants with

a layer of mulch soil to reduce water evaporation.

3. The car should be scrubbed, not washed with water pipe and then scrubbed.

(4) what are the main ways to save water at home?

First, families who use water to flush toilets can put 1-2 bricks in the water tank,

so as to reduce the water discharge and achieve the purpose of saving water.

Second, use less washing machines, because washing clothes with washing machines consumes twice as much water as washing clothes by hand. In order to save water, except for quilts, sheets and other large pieces, it is better to wash other small clothes by hand.

thirdly, the method of comprehensive utilization and multi-use of one water is adopted to save water. For example, rice washing water can be used to water flowers; Face wash water can be used for washing clothes or washing feet.

(5) what matters should be paid attention to in household water saving?

1. Turn off the dripping faucet in time.

2. install a water-saving device in the toilet water storage tank.

3. Don't water the flowers at noon, because the sunshine is strong at noon, and the water is easy to evaporate.

4. installing a running water controller on the faucet can save a lot of water.

5. Tell the whole family not to leave the tap running when washing fruits and vegetables, washing handkerchiefs and shaving.

6. Write "Please pay attention to saving water" at your faucet.

7. please tighten the faucet when you go out after the power is cut off and the water is stopped.

History of Mathematics Development

1. wolf prize in mathematics winner, an internationally renowned master of mathematics, Chen Shengshen entered Tsinghua University Research Institute in p>1931 and obtained a master's degree in 1934. In 1934, he went to Hamburg University to study at Blaschke. In 1937, he returned to China as a professor at Southwest Associated University. From 1943 to 1945, he worked as a researcher at Princeton Institute for Advanced Studies. In early 1949, he went to the United States. He was a professor at the University of Chicago. In 196, he became a professor at the University of California, Berkeley, and retired as an honorary professor in 1979. He continued to teach until 1984. From 1981 to 1984, he served as the director of the newly-built Berkeley Institute of Mathematics, and later served as honorary director. Chen Shengshen's main field of work is differential geometry and its related branches. He has also made pioneering contributions in many fields, such as integral geometry, projective differential geometry, minimal submanifolds, network geometry, total curvature and various immersion theories, external differential forms and partial differential equations. Chen Shengshen has many honors, including academician of Academia Sinica (1948), academician of National Academy of Sciences (1961) and National Science Medal (1975). Won the Wolf Award in 1983/1984 and the Lifetime Achievement Award in the Steele Award of the American Science Association in 1983.

2. Hua Luogeng, a great mathematician with international reputation and an important founder of the development of mathematics in New China, was a mathematician with a legendary life experience and dropped out of school at an early age. In 193, he published an article on the solution of algebraic equations in Science. In 1936, he worked as a visiting scholar at Cambridge University in England. He returned to China in 1938 and was hired as a professor at Southwest United University. In 1946, he was invited by Princeton Institute of Advanced Studies to be a researcher and taught at Princeton University. He has been a professor at the University of Illinois since 1948. After returning to China in 195, he successively served as Professor Tsinghua University, director of the Institute of Mathematics of China Academy of Sciences, member and deputy director of the Department of Mathematics and Physics, director and vice president of the Department of Mathematics of China University of Science and Technology, director of the Institute of Applied Mathematics of China Academy of Sciences, vice president of China Academy of Sciences and member of the presidium. He also served as the chairman of chinese mathematical society for many times. In addition, Hua Luogeng was a member of the first, second, third, fourth and fifth sessions of the NPC Standing Committee and vice chairman of the Sixth National Committee of China People's Political Consultative Conference. Hua Luogeng is a mathematician who enjoys a high reputation in the world. His name is listed with a few classic mathematicians in famous museums such as Smithsonian Museum and Chicago Museum of Science and Technology. He was elected as a foreign academician of the American Academy of Sciences, a member of the Third World Academy of Sciences and a member of the Bavarian Academy of Sciences of the Federal Republic of Germany. He was awarded honorary doctorates by Nancy University in France, the Chinese University of Hong Kong and the University of Illinois in the United States. Hua Luogeng has made outstanding contributions in a wide range of mathematical fields, such as analytic number theory, matrix geometry, typical groups, automorphic function theory, multiple complex variable function theory, partial differential equations, high-dimensional numerical integration and so on. Because of Hua Luogeng's great contribution, there are many theorems, lemmas, inequalities, operators and methods named after him. He has published nearly 3 monographs and academic papers. Hua Luogeng also advocated applied mathematics and computer development according to the reality of China and the international trend. He personally went to twenty-seven provinces and cities to popularize and apply mathematical methods for twenty years, and made great contributions to economic construction.

3. Wang Hao, a master of logical mathematics next to Godel, graduated from the Department of Mathematics of Southwest United University in p>1943. Graduated from the Philosophy Department of Tsinghua University Graduate School in 1945. In 1948, he received a doctorate in philosophy from Harvard University. From 195 to 1951, he worked in the Institute of Mathematics of Swiss Federal Institute of Technology, and served as an assistant professor of Harvard University from 1951 to 1953. From 1954 to 1961, he gave the second set of Locke lectures at Oxford University, England, and served as a senior professor of logic and mathematical philosophy. From 1961 to 1967, he was a professor at Harvard University. After 1967, he became a professor at Rockefeller University in the United States and presided over the work of the logic research room. In 1985, he served as honorary professor of Peking University, China. In 1986, he served as honorary professor of Tsinghua University, China. In the early 195s, he was elected as a member of the National Academy of Sciences of the United States, and later as a foreign member of the British Academy of Sciences, a Chinese-American mathematician, logician, computer scientist and philosopher.

4. Lin Jiaqiao, a famous mathematician and mechanic and academician of the American Academy of Sciences, graduated from the Physics Department of Tsinghua University in p>1937. In 1941, he received a master's degree from the University of Toronto, Canada. In 1944, he received his doctorate from California Institute of Technology. Since 1953, he has served as a professor of mathematics, a professor at the Massachusetts Institute of Technology and an emeritus professor. Professor Lin Jiaqiao has won the Timoshenko Award of the American Society of Mechanical Engineers, the Applied Mathematics and Numerical Analysis Award of the National Academy of Sciences, and the american physical society Fluid Mechanics Award. He is a member of the National Academy of Arts and Sciences (1951), the National Academy of Sciences (1962) and the Academia Sinica in Taiwan Province (196). Since the 194s, Professor Lin Jiaqiao's work on the flow stability and theory of turbulence of fluid mechanics has led a whole generation to explore this field. Since 196s, he has entered the research field of astrophysics, and initiated the density wave theory of spiral structure of galaxies, which is internationally recognized. On June 8, 1994, he was elected as the first batch of foreigners of China Academy of Sciences.

5. Ceng Yuanrong, a pioneer in the field of functional analysis in China,

entered Tsinghua University (predecessor of Tsinghua University) in p>1919 and studied in the preparatory department of the United States until July 1927. Because of his excellent academic performance, he studied and studied mathematics at the University of Chicago, Princeton University and Yale University, and obtained his doctorate in 1933. From August 1934 to July 1942, he taught in Tsinghua University (in 1938, he joined Peking University and Nankai University to form Southwest United University in Kunming). In February 195, Professor Sun Guangyuan, director of the Department of Mathematics of National Nanjing University, wrote to hire him to teach at Nanjing University until he retired. He once established the earliest computational mathematics major in China. He has been engaged in functional analysis for a long time and is one of the pioneers in this field in China, and has made outstanding achievements in the field of generalized inverse.

6. Zhao Fangxiong, the earliest scholar who advocated applied mathematics and computational mathematics in China, was admitted to Tsinghua University in Beijing in p>1922. At that time, Tsinghua University was a preparatory school for studying in the United States at public expense, and the competition was fierce. In Jiangsu, only three students were recruited, and he ranked first among many candidates. After graduation, I went to study in the Department of Electrical Engineering of Massachusetts Institute of Technology (MIT). He graduated from the Department of Electrical Engineering in 193, was admitted as a graduate student by the Department of Mathematics of Harvard University, and obtained a master's degree in 1931. In 1933, he was hired to teach in the Department of Mathematics of Tsinghua University. In 1935, he was hired as a professor. Since then, he has been teaching in Tsinghua University and participated in the establishment of the first computational mathematics major in China. Zhao Fangxiong was the vice president of Tsinghua University twice in 1962 and 1978. From 198 to 1984, he was also the newly established head of applied mathematics department, and was employed as a member of the discipline evaluation group of the State Council Academic Degrees Committee. He served as director and honorary director of chinese mathematical society. From 1978 to 1989, he served as the chairman of the first and second computational mathematics societies, the honorary chairman of the third session and the editor-in-chief of Journal of Computational Mathematics. Mathematicians and mathematicians. One of the earliest scholars who advocated and engaged in the teaching and research of applied mathematics and computational mathematics in China. Self-edited the first teaching material of Advanced Calculus for engineering in China. He has made great achievements in finding the roots of equations and applied mathematics research.

7. Wu Daren, a famous mathematician and math educator, and Chen Shengshen graduated from Nankai University with summa cum laude in p>193, and got a postgraduate degree in Tsinghua University. In the summer of 1933, with Jiang Lifu's encouragement, Wu Daren took the first publicly-funded study abroad exam between China and Britain and was admitted to study in Britain. He wanted to study at Cambridge University, but missed the opportunity to enter the school when he arrived in London. He changed to University College of London and registered as a doctoral student. In early September 1937, Wu Daren went to teach at Wuhan University, and then moved to Leshan, Sichuan with Wuhan University. Later, he served as the leader and teacher of Nankai University for a long time, and wrote and translated many kinds of mathematics textbooks and masterpieces. He has made positive contributions to China's higher education. Research fields involve integral geometry, non-Euclidean geometry, differential geometry and their applications (gear theory). In 1981, he was a member of the first mathematics group of the National Academic Degrees Committee, the editor of the Mathematical Volume of the Encyclopedia of China, the deputy editor-in-chief of the discipline of geometry and topology, and the first and second members of the National Committee for the Examination and Approval of Natural Science Terms.

8. Zhuang Qitai, a famous mathematician and professor of Peking University

was admitted to Tsinghua University in p>1927 and graduated from the Department of Mathematics of Tsinghua University in 1932. In 1934, Professor Xiong Qinglai accepted Zhuang Qitai as his graduate student, and in 1936 he graduated from the Institute of Science of this school. In 1938, he received a doctorate in mathematics from the University of Paris, France. He used to be a professor at Yunnan University. After the adjustment of departments in 1952, Zhuang Qitai remained in Peking University. Since then, in addition to continuing to serve as the teaching task of complex variable function course, he has also talked about conformal transformation, quasi-conformal transformation, integral function and meromorphic function and other professional courses. Member of the Jiu San Society. He has been engaged in the research of function theory for a long time and has made important achievements in the theory of value distribution of whole functions and meromorphic functions. Author of Singular Direction of Meromorphic Functions, co-editor of Analytic Function Sofonecom Plex Variable (published in the United States)

9. Famous mathematician, mathematics educator, president of Sichuan University, Ke Zhao

joined the Department of Computing in Tsinghua University in p>1931. In 1933, Ke Zhao graduated with honors. In 1935, he was admitted to the Chinese-English G-style public-funded international students, went to the University of Manchester in England for further study, studied quadratic forms under the guidance of his tutor L．J． Mordell, and achieved excellent results in the problem that quadratic forms are linear sum of squares. After returning to China, he taught at Chongqing University and Sichuan University successively. In 1953, he was transferred back to Sichuan University to teach. During these 4 years, he devoted himself to teaching and scientific research with great enthusiasm, trained many outstanding mathematical talents for the country, and achieved fruitful results in scientific research. At the same time, he has successively served as the provost, vice president, principal and director of the Institute of Mathematics of Sichuan University. As an academic leader and the head of the school, he has effectively grasped several important aspects of work: striving to improve the quality of teaching, actively carrying out basic theoretical research, developing applied mathematics and cultivating a group of high-level talents. Its research fields involve number theory, combinatorial mathematics and algebra. Many outstanding achievements have been made in the field of quadratic and indefinite equations. In 1955, he was selected as a member of China Academy of Sciences.

1. Academician of Academia Sinica, member of the first batch of academic departments, Xu Baolu

entered the Department of Mathematics of Tsinghua University in p>1929, and graduated with a Bachelor of Science degree in 1933. In 1936, Xu Baolu was admitted to study in Britain and sent to University College London to study mathematical statistics in the Department of Statistics and pursue a doctorate. He went to Kunming in 194 and taught at Southwest United University. In 1948, he was elected as an academician of Academia Sinica. Soon after returning home, I found that I had tuberculosis. He has been working in spite of illness for a long time, and his teaching and scientific research have been uninterrupted. He has published more than 1 papers on matrix theory, probability theory and mathematical statistics. In 1955, he was elected as a member of the Chinese Academy of Sciences. Started the teaching and research of probability theory and mathematical statistics in China. He has made outstanding achievements in Neiman-Pearson theory, parameter estimation theory, multivariate analysis and limit theory, and is one of the pioneers of multivariate statistical analysis. In 1955, he was selected as a member of China Academy of Sciences.

11. Academician of Chinese Academy of Sciences, former head of the Department of Mathematics of Peking University, Duan Xuefu

was admitted to the Department of Mathematics of Tsinghua University in p>1932 (then known as the Department of Mathematics). In the summer of 1936, Duan Xuefu received a Bachelor of Science degree and stayed as a teaching assistant after graduation. In August 1941, he entered the mathematics department of Princeton University in the United States.