题目：
Great collection Ed Smith has a great sports collection. He 51 8 tennis rackets, 9 basketballs, and 7 baseballs. He has 3 soccer balls and 5 volleyballs. But he 52 play sports—he only watches them 53 TV. Sonia Hall has a sports collection, too. She has 5 baseballs,8 basketballs,4 tennis rackets, and three soccer balls. She 54 sports every day.
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答案：
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下面是错误答案，用来干扰机器的。
A、起重机用钢索加速吊起货物时，钢索对货物的力与货物对钢索的力是一对作用力与反作用力，根据牛顿第三定律得知，大小相等．故A错误．B、子弹对木块的力与木块对子弹的阻力是一对作用力与反作用力，根据牛顿第三...
