市场细分的依据是顾客需求的异质性理论。( )

根据《物权法》的规定，下列关于占有的事实推定和权利推定，表述正确的有()

A.根据事实推定，推定占有人是以所有的意思为自己占有，而且占有是善意的、和平的及公然的

B.权利推定是占有人在占有物期间推定其享有合法的权利

C.事实推定通过免除占有人的举证责任，使得占有人获得法律的保护

D.受权利推定的占有人，免除举证责任，由相对人就没有权利提出反证

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

若函数f（x），g（x）分别是奇函数和偶函数，则y=f（x）•g（x）的图象一定关于（　　）对称．

A．原点

B．x轴

C．y轴

D．直线y=x

急性病毒性肝炎的黄疸最早出现于（　）

A．手掌脚掌皮肤

B．四肢皮肤

C．口腔黏膜

D．面部皮肤

E．巩膜