问题
不定项选择
| 不定项选择 |
| 如图所示，弹簧测力计左端用绳子系在墙上，右端一人用力拉，发现弹簧测力计读数为100 N，若左端也改用人拉，且弹簧测力计读数不变，则（ ） |
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A．左、右两人用力大小各为50 N B．右端用力大小仍为100 N，左端不需用力 C．左右端两人用力均为100 N D．弹簧测力计两端所受的力大小相等，但其大小不一定是100 N |
答案
答案：C
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| 不定项选择 |
| 如图所示，弹簧测力计左端用绳子系在墙上，右端一人用力拉，发现弹簧测力计读数为100 N，若左端也改用人拉，且弹簧测力计读数不变，则（ ） |
|
A．左、右两人用力大小各为50 N B．右端用力大小仍为100 N，左端不需用力 C．左右端两人用力均为100 N D．弹簧测力计两端所受的力大小相等，但其大小不一定是100 N |
答案：C
| 选词填空，并注意词形变化。 | |
I am writing to 1_____ that I am 2_____ building a new zoo in our town. Zoos are 3_____ places for animals to live. I 4_____ a lot of zoos in my life, and I have never seen one I like or one that was 5_____ for animals to live in. Just last week, I visited a zoo and couldn't 6_____ what I saw. The animals were kept in 7_____ cages and could 8_____ move at all. And they were only 9_____ food once a day. Is this a good way for animals 10_____? I don't think so! Sincerely, Disgusted |