做匀速圆周运动的物体，下列不变的物理量是 A．速度 B．加速度 C．角速度 D．

复式记账法的基本理论依据是“资产=负债+所有者权益”这一平衡原理。( )

阅读短文，选择正确答案。

     A man was looking for things of the old times. One day he came to a village and found a blue bowl. It looked

very old. The bowl was on the ground and a cat was drinking milk from it. A farmer, the owner of the cat, was

sitting beside the bowl. The man did not want the farmer to know that he was interested in the bowl. So he said

to him in a soft voice, "What a nice cat you have! Will you sell it to me?"

    "How much will you give me for the cat?" the farmer asked.

    "Thirty dollars. Would that be enough?" Later, the farmer agreed. After he paid the farmer, the man said,

"This cat is used to eating with his bowl. May I take this bowl with the cat?" But the farmer said,"I'm sorry I

can't give you the bowl. Thanks to the bowl, I have sold thirty cats."

1. What does the sentence "A man was looking for things of the old times" mean? [ ]

A. He lost things in the past and wanted to get them back.

B. He liked talking to old people.

C. He liked keeping old things.

2. Why did the man want to buy the cat? [ ]

A. He liked it better than the bowl.

B. It was sold with the bowl.

C. He thought he could easily get the bowl after he bought the cat.

3. After he bought the cat, the man asked for the bowl, because he thought            .[ ]

A. the cat couldn't live without the bowl

B. the farmer didn't know the value of the bowl

C. the bowl should go with the cat

4. The farmer kept the bowl so that he could             . [ ]

A. let another cat use it

B. sell more cats

C. sell more bowls

5. From the story we can see that the farmer            . [ ]

A. had only one bowl

B. didn't like cats

C. was cleverer

2009年1月13日，国务院 * * 温 * * 主持召开国务院常务会议，决定加快推进电信网、广播电视网和互联网三网融合。会议提出，到2015年全面实现电信网、广播电视网和互联网三网融合发展。实现三网融合，最根本的依赖于[     ]

A．国家投资

B．引进国外先进技术

C．自主创新

D．国际合作

塔底、塔顶压差增大的原因是什么？如何处理？

要使网上交易成功首先要能确认对方的（）

A.身份

B.信用程度

C.资金多少

D.是否上网