题型：问答题 简答题 两个质量相等的小球在光滑水平面上沿同一直线同方向运动，A球的动量是7kg·m/s，B球的动量是5kg·m/s，A球追上B球时发生碰撞，则碰撞后A、B两球的动量可能值是 ( )A．pA=6kg·m/s，PB=6kg·m/s B．pA=3kg·m/s，PB=9kg·m/s C．pA=－2kg·m/s，PB=14kg·m/s D．pA=－5kg·m/s，PB=15kg·m/s 查看答案
题型：问答题 简答题 如图盛水的烧杯里有一只盛水的试管，加热烧杯使水沸腾。继续加热，保持烧杯中水始终沸腾，试管中的水能否沸腾（）A．不会沸腾B．可以沸腾C．用急火加热时，才能沸腾D．烧杯里液体的液面超过试管液体液面时，才可以沸腾 查看答案
题型：问答题 简答题 由于进口国对某种商品的进口实行数量限制，并通过政府间多、双边贸易协定谈判，要求出口国控制出口数量，从而使出口国对这类出口实施数量限制，称作（）。A．被动配额管理B．主动配额管理C．计划配额管理D．关税配额管理 查看答案
题型：问答题 简答题 完形填空。 One day a king and his minister (大臣) went out for a walk. The king said to the minister, "I want to give reward to anyone who is hospitable (好客的) to us during our 1 ." The king and the minister went up to one man and said," We are 2 .This is a fine town. Could we stay at your house as 3 ?" The man looked down upon them, saying," 4 do I know you're not criminals (犯人)?" Then the king and the minister went up and 5 on somebody else's door. When the man opened the 6 ,they asked, "Could we spend the night here? It's getting dark." The man said, "First, tell me 7 of you there are. Then I'll decide." The king said,"You see that we are only two. If you 8 us to stay with you, we'll pay you what we have tomorrow." The man agreed. Then they 9 walking. They came to another house and knocked on the door. The king said, "It's getting dark. 10 we spend the night at your house?" The man said," 11 ! Just tell me how many of you there are." The king said,"You can see we are only two." Then they 12 back to the palace. The minister had 13 the address of each person to whom they had spoken, and the following 14 the king called all the three persons to the palace. To the first one the king said," When travelers come from a different kingdom, we must 15 them shel ter (住所). It is 16 we aren't thieves." And the king 17 the man out of his kingdom. To the 18 man the king gave a lot of money. To the third one, who 19 offered shelter and only then asked how many were 20 . ( )1. A. sleep ( )2. A. friends ( )3. A. owners ( )4. A. How ( )5. A. dropped ( )6. A. letter ( )7. A. how many ( )8. A. agree ( )9. A. began ( )10. A. Would ( )11. A. Pardon ( )12. A. went ( )13. A. taken away( )14. A. year ( )15. A. borrow ( )16. A. silly ( )17. A. threw ( )18. A. last ( )19. A. bravely ( )20. A. order B. talk B. criminals B. officials B. Why B. took B. box B. how much B. allow B. enjoyed B. Must B. Thanks B. hurried B. taken down B. month B. offer B. right B. invited B. first B. slowly B. promise C. dinner C. ministers C. ofiicers C. When C. knocked C. door C. how long C. make C. stopped C. Could C. Sorry C. retumed C. taken off C. minute C. lend C. clean C. kept C. third C. immediately C. name D. walk D. travelers D. guests D. Where D. touched D. window D. how far D. want D. continued D. Should D. Certainly D. drove D. taken up D. day D. share D. clear D. brought D. second D. carefully D. crown 查看答案
题型：问答题 简答题 以下有关传热系数检测的条件正确的是（）。A、热箱空气平均温度设定范围为19℃～21℃，温度波动幅度不应大于0.2KB、热箱内空气为自然对流C、热箱内空气为人工对流D、冷箱空气平均温度设定范围为-19℃～-21℃，温度波动幅度不应大于0.3K 查看答案
