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The Intel Science Talent Search is the top science competition for high school students in the US. The 40 finalists were honored in Washington last week. They met with scientists and politicians. President Obama welcomed them to the White House. These 40 students were selected from almost 2,000 contestants nationwide. They had to present original research to be judged by professional scientists. The students showed their research projects on large posters. The winners were announced on March 15 th , 2011. Wendy Hawkins is executive director of the Intel Foundation, who says the 40 finalists represented excellence across many areas of science. Selena Li is from Fair Oaks, California. She wanted to find a more effective treatment for liver cancer. She began her research four years ago. A scientist at the University of California, Davis, taught her how to design and do experimental work in the laboratory. Ms. Li placed 5th in the Intel Science Talent Search and was awarded 30,000 dollars. Scott Boisvert lives near Phoenix, Arizona. He began using a laboratory at the University of Arizona at the age of 14. Over four years, he completed a project studying a fungus(真菌) linked to the decrease in amphibians(两栖动物)around the world. He was trying to find out if different chemicals and substances in the water could kill the fungus. He collected and tested water samples across Arizona. He says, “My results were able to identify a list of chemicals that were significant in the growth and in the movement of the fungus.” He placed10 th in the Intel competition and was awarded 20,000 dollars. Evan O’Dorney of Danville, California, won the top award of 100,000 dollars in this year’s Intel Science Talent Search. For his mathematical project, he compared two ways to estimate the square root of an integer (整数) , a number with no fractional parts. Wendy Hawkins at the Intel Foundation says these young people represent the next generation of scientists who will help shape America’s future. 小题1:According to the passage, if you want to win the Intel Science Talent Search, you must________. A.have high academic achievement B.be excellent in all areas of science C.offer original research D.do many experiments in a university lab 小题2:Who will be probably engaged in math study in the future and become a mathematician? A.Wendy Hawkins. B.Selena Li. C.Scott Boisvert. D.Evan O’Dorney 小题3:Which statement is TRUE according to the passage? A.Scott Boisvert found a new fungus linked to the decease in amphibians. B.The 1st, 5th and 10th students in the competition come from California. C.Scott Boisvert is the youngest winner among the 40 students. D.The Intel Science Talent Search is an intense competition. 小题4:The Wendy Hawkins’s attitude to these 40 finalists is ______. A.critical B.negative C.positive D.mixed
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【单选题】国家对动物疫病实行( )的方针。
A.
强制免疫
B.
预防为主
C.
逐级上报
D.
属地管理
【判断题】1390()已知通入苯乙烯反应器的原料乙苯量为1000kg/ h,苯乙烯收率为40%,以反应乙苯计的苯乙烯选择性为90%。原料乙苯中含甲苯2% (质量分数),则每小时参加反应的乙苯量为435kg。
A.
正确
B.
错误
【简答题】《动物防疫法》规定,国家对动物疫病实行( )的方针。
【判断题】注射机的最大注射压力应稍大于塑件成型所需的压力。所以要对注射机的注射压力进行校核。
A.
正确
B.
错误
【判断题】注射机的最大注射压力应稍大于塑件成型所需的注射压力,所以要对注射机的注射压力进行校核。
A.
正确
B.
错误
【单选题】衬砌混凝土灌筑后( )小时应开始洒水养护,以保持混凝土良好的硬化条件
A.
2-3
B.
10-12
C.
20-24
【单选题】国家对动物疫病实行()的方针
A.
预防为先
B.
防病为主
C.
控制为主
D.
预防为主
【单选题】国家对动物疫病实行( )的方针
A.
预防为先
B.
防病为主
C.
控制为主
D.
预防为主
E.
防疫为主
【判断题】注射机的最大注射压力应稍大于塑件成型所需的压力,所以要对注射机的注射压力进行校核。
A.
正确
B.
错误
【简答题】电子镇流器和电感镇流器有何异同?
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