如图为常见的自行车传动示意图.A轮与脚登子相连,B轮与车轴相连,C为车轮.当人登

题型:选择题

问题:

如图为常见的自行车传动示意图.A轮与脚登子相连,B轮与车轴相连,C为车轮.当人登车匀速运动时,以下说法中正确的是(  )

A.A轮与B轮的角速度相同

B.A轮边缘与B轮边缘的线速度相同

C.B轮边缘与C轮边缘的线速度相同

D.A轮与C轮的角速度相同

考点:线速度角速度
题型:选择题

对肾结核患者进行健康指导不正确的是()

A.适当活动

B.不随意增减抗结核药量

C.术后坚持服抗结核药1个月

D.观察有无恶心、呕吐、耳鸣、听力下降等

E.勿用氨基糖苷类、磺胺类药物

题型:选择题

表情呆钝,智力衰退,哭笑无常,不思饮食,口多涎沫,舌质淡,苔白腻,脉细滑。最佳治法是()。

A.调节气机,健脾养心

B.补肾健脾,益气生津

C.健脾化浊,豁痰开窍

D.育阴潜阳,交通心肾

E.补肾益髓,填精养神

题型:选择题
用计算机辅助实验系统(DIS)做验证牛顿第三定律的实验时,把两个测力探头的挂钩钩在一起,向相反的方向拉动,显示器屏幕上显示的是两个力传感器的相互作用力随时间变化的图象,如图所示。由图象可以得出的正确结论是(   )

A.作用力与反作用力作用在同一物体上

B.作用力与反作用力同时存在,不同时消失

C.作用力与反作用力大小不相等

D.作用力与反作用力方向相反

题型:选择题

What makes one person more intelligent than another? What makes one person a genius, like the brilliant Albert Einstein, and another person a fool? Are people born intelligent or stupid, or is intelligence the result of where and how you live? These are very old questions and the answers to them are still not clear.

We know, however, that just being born with a good mind is not enough. In some ways, the mind is like a leg or an arm muscle. It needs exercise. Mental (done with the mind) exercise is particularly important for young children. Many child psychologists (心理学家) think that parents should play with their children more often and give them problems to think about. The children are then more likely to grow up bright and intelligent. If, on the other hand, children are left alone a great deal with nothing to do, they are more likely to become dull and unintelligent.

Parents should also be careful with what they say to young children. According to some psychologists, if parents are always telling a child that he or she is a fool or an idiot, then the child is more likely to keep doing silly and foolish things. So it is probably better for parents to say very positive (helpful) things to their children, such as “That was a very clever thing you did.” or “You are such a smart child.”

36. The words “intelligent” and “brilliant” in the first paragraph probably mean _______ while “dull” in the second paragraph means ________.

A. bright and splendid; slow in thinking and understanding

B. pretty and handsome; ordinary-looking

great and important; common

D. hopeful and helpful; careless

37. According to the context we can guess that a genius is ________ while an idiot is ________.

A. a normal person; a funny person

B. a strong person; a weak person

a highly intelligent person; a foolish or weak-minded person

D. a famous person; an ordinary person

38. A person ________ is more likely to become a genius.

A. whose parents are clever

B. often thinking about difficult problems

often helped by his parents and teachers

D. born with a good brain and putting it into active use

39. It is better for parents ________.

A. to praise and encourage their children more often

B. to be hard on their children

to leave their children alone with nothing to do

D. to give their children as much help as possible

40. Which of the following is NOT true according to the article?

A. Parents play an important part in their children’s growth.

B. The less you use your mind the duller you may become.

C. Intelligence is obviously the result of where and how you live.

D. What makes a person bright or stupid is still under discussion.

题型:选择题

中国诗歌创作现实主义和浪漫主义的源头分别是()

A、《诗经》

B、《老子》

C、《楚辞》

D、《淮南子》

更多题库