依据《产品质量法》规定，产品质量的民事责任，是一种（）。 A.质量责任 B.过错责任

阅读理解。

     If you do not use your arms or your legs for some time, they become weak; when you start using them

again, they slowly become strong again. Everybody knows that. Yet many people do not seem to know that

memory works in the same way.

     When someone says that he has a good memory, he really means that he keeps his memory in practice by

using it. When someone else says that his memory is poor, he really means that he does not give it enough

chance to become strong.

     If a friend says that his arms and legs are weak.we know that it is his fault (过错). But if he tells us that

he has a poor memory. Many of us think that his parents are to blame (责备), and few of us know that it is

just his own fault.

      Have you ever found that some people can't read or write but they have better memories? This is because

they cannot read or write and they have to remember things; they cannot write them down in a little notebook.

They have to remember days, names, songs and stories; so their memory is the whole time being exercised.

     So if you want to have a good memory, learn from the people:practice remembering.

1. The main reason for one's poor memory is that _________.

A. his memory is not often used.

B. he does not use his arms or legs for long.

C. his father or mother may have a poor memory.

D. he can‘t read or write at all.

2. From the passage we learn that if our arms and legs are weak, _________.

A. we won't be able to use them any more

B. they will become strong very soon

C. they won't become strong till we use them again

D. that is not related to ourselves

3. Which of the following is not true according to the passage?

A. Your memory works in the same way as your arms or legs.

B. Writing things down will help you remember them.

C. A person with a good memory must be able to read and write.

D. A good memory comes from its more practice.

4. Some people can't read or write, hut they usually have better memories, because_________.

A. they have less trouble in writing things

B. they can remember things more easily

C. they are better at learning from others

D. they have to keep their memories in more use

5. Which is the best title of this passage?

A. Don't Stop Using Your Arms or Legs

B. How to Have a Good Memory

C. How to Keep Your Body Strong

D. Reading, Writing and Memory

某工厂今年3月份的产值为50万元，4月份和5月份的总产值为132万元．若设平均每月增长的百分率为x，则列出的方程为：（　　）

A．50（1+x）=72

B．50（1+x）×2=72

C．50（1+x）²=72

D．50（1+x）+50（1+x）²=132

“伊里调查”的主持者是（）。

A.拉斯韦尔

B.拉扎斯菲尔德

C.卢因

D.霍夫兰

维生素K在肝脏、蛋黄、绿叶蔬菜、豆油和其他植物中较丰富。

C类机械由（）组织验收。

A.企业

B.机械部门

C.使用单位

D.机管员