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问题 选择题

下列关于压力和压强的说法正确的是（　　）

A．物体重力越大，产生的压力越大

B．在受力面积相等时，重力大的物体产生的压强一定大

C．压力大的物体产生的压强不一定大

D．受力面积小的物体产生的压强一定大

答案

A、物体重力越大，产生的压力不一定越大，只有水平面上的物体，产生的压力等于其重力；故A错误；

B、在受力面积相等时，压力越大的物体产生的压强越大；故B错误；

C、压力大的物体产生的压强不一定大，因为压强大小还与受力面积有关；故C正确；

D、受力面积小的物体产生的压强不一定大，因为压强大小还与压力大小有关；故D错误；

故选C．

填空题
阅读短文，从方框中选择适当的词并用其正确形式填空。方框中有两个词是多余的。
dirty with have always time they large want speak lesson first drop

     After a quick breakfast, I went into the lecture hall in a hurry. A famous teacher was    1    to the
students. He was holding up a $100 bill. Then he said to the three hundred students, "Who would like
this $1 00 bill?" The students put up    2    hands at once. Then he said, "I am going to give this $100
bill to one of you, but    3   , let me do this." He made the bill into a ball. Then he said. "Who    4    it
now?" The hands went back into the air, "Well," he said, "what if I do this?" and he    5    it on the floor
and stepped on it. He picked up the    6    bill and said. "Who still wants it?" Hands went back again into the air.
      "My friends,"  he said, "you have learned a valuable (有价值的)    7    today. No matter what I did
to the $100 bill! Many    8    in our life, we are dropped and stepped on. We feel as if we are worth nothing.
But remember, no matter what    9    happened to you, you will never lose your value: You are   10     
valuable to those people who love you. Your value doesn't come from what you do or whom you know,
but who you are."
1.______ 2.______ 3.______ 4.______ 5.______
6.______ 7.______ 8.______ 9.______ 10.______
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单项选择题

对于於梨华，“直到《又见棕榈，又见棕榈》出版，於氏才真正成了‘没有根一代’的代言人。这说法正是在该小说中新创的，一语道破了年轻一代的处境”。给于这样评价的是？（）

A、白先勇

B、杨义

C、陈平原
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