试题与答案

宇航员在某星球表面,将一小球从离地面h高处以初速度v0水平抛出,测出小球落地点与

题型:问答题

题目:

宇航员在某星球表面,将一小球从离地面h高处以初速度v0水平抛出,测出小球落地点与抛出点间的水平位移s.

(1)若该星球的半径为R,万有引力恒量为G,求该星球的质量;

(2)若该星球的半径为R,求该星球卫星的第一宇宙速度;

(3)若该星球的半径为R,求距离该星球表面3R处卫星的线速度大小.

答案:

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我国东北-西南走向的山脉,自西向东分为三列:西侧一列包括大兴安岭、太行山、巫山、雪峰山等;中间一列包括长白山、武夷山等;最东的一列是台湾岛上的台湾山脉.故选;B.

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根据对话内容完成短文,每空一词。(每空 0.5分,共5分)

This is an interview to a teenager(青少年).

Interviewer: Thanks for coming in for the interview, Susan.

Susan: That’s ok. 

Interviewer: ok, how often do you exercise?

Susan: Every day. 

Interviewer: How often do you eat vegetables and fruit? 

Susan: I eat vegetables and fruit every day.

Interviewer: All right! So how many hours do you sleep every night?

Susan: Nine. I need lots of sleep. 

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Susan: Never. I can’t stand milk. It’s terrible. 

Interviewer: What about junk food? 

Susan: Yeah, I love it. I guess I eat once or twice a week.

Interviewer: Well, thank you very much.

Susan: You’re welcome. 

Susan is pretty healthy. She小题1:every day, and her eating【小题2】are pretty good. She eats fruit and【小题3】  every day. Of【小题4】, she also loves小题2: food, but she【小题6】 to eat only once a week. She thinks milk is【小题7】. And she【小题8】 nine hours every night. So you see, she looks【小题9】. Good food and exercise【小题10】 her to study better. 

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题型:单项选择题

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C.左胫骨上1/3骨折并左胫前动脉损伤
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