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问题 计算题

质量为150kg的网球从离地高3.2m处自由落下，着地后经0.1s反弹起来，上升到离地1.8m处速度减小为零。试求网球在着地过程中所受地面弹力的平均值。（空气阻力不计，g取10m/s2）

答案

22.5N

多项选择题

肺炎患儿出现心力衰竭时，其护理为（）

A.绝对安静，取半卧位卧床休息

B.立即给氧

C.注意记录，但不必限制水、钠摄入

D.严格记录出入量，限制钠盐摄入

E.遵医嘱使用强心剂
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单项选择题

The Curies had hoped that the Nobel Prize would finally bring the opportunity for a chair at the French Academy and the laboratory that went with it. 62 , it brought unwanted publicity and more responsibility. Therefore, both Curies were 63 to share their knowledge and teach classes: Pierre Curie at the Sorbonne, and Marie Curie at Sevres.
Marie Curie was the first female professor at Sevres, a college for girls who wanted to teach higher education. These twenty-year-olds would 64 become professors. Marie was not liked by her pupils during her first year as a professor. 65 her second year, the students loved her. One student reported that the courses taught by Marie were "the 66 reference during the entire length of my 67 . She didn’t dazzle us, she 68 us, attracted us, held us with her simplicity, her 69 to be useful to us, the sense she had of both our ignorance and our 70 " She was the first to take her students into the laboratory to 71 manipulate their newly-learned theories. She also taught by example, and invited the physics class to hear the 72 of her dissertation. Marie argued for the 73 of additional, difficult tests given only to the female students. She also 74 the dean to provide calculus classes to the female students. Marie wanted the girls to have the 75 to succeed in academia and fought tooth and nail to provide every 76 .
This woman is known for her scientific discoveries and the progress 77 from them. Of course her scientific discoveries are 78 and useful. It is also important to understand the kind of woman that she was. She was stubborn, 79 she hated to lose, but it was her goal to use science to help the world in whatever way possible. Her stubbornness led to persistence and 80 . These qualities promoted the use of her brilliance. The love and support of her family taught Marie to never question the possibilities that stood 81 her.

A．performance

B．determination

C．conformity

D．intelligence
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