根据某些条件对一个关系作水平分解，选择符合条件的元组组成一个新的关系，这样的操作称为

阅读理解。

     Mr. and Mrs. Green come from America. They teach English in No.7 Middle School in Wuhan,

China. They like their work. They have two children,Tom and Sue. They are in Wuhan, Too. Mr. Green

can speak Chinese. He likes swimming and reading. He likes to watch TV. He often sees some shows,

such as Sports News, Culture China, Walk China. But he can't stand the Chinese TV plays. Mrs. Green

likes swimming in the afternoon and cooking. She likes to watch the show Chinese Cooling and she likes

soap operas. Tom and Sue like playing computer games. They also like the show Animal World and

Animation City .Tom doesn't like CCTV News.

1. — Where are Tom and Sue from?

    — They are from ____.

A. English    

B. America

C. Japan      

D. China

2. — What does Mr. Green like?

    — He likes ____.

A. reading and swimming

B. cooking

C. playing computer games

D. watching

3. What shows does Mrs. Green like? 

A. Sports News. 

B. Walk China .

C. Chinese TV plays.

D. Chinese Cooking.

4. What shows do Tom and Sue like?

A. Animation City.

B. Soap Operas.

C. Culture China .

D. Computer games.

5. Who doesn't like CCTV News?

A. Mr. Green.  

B.  Mrs. Green

C. Sue          

D. Tom.

空间探测器从某一星球表面垂直升空，在探测器升空一段时间后发动机突然关闭．探测器的运动图像如右图所示，则由图可知(    )

A．探测器在9秒末到达最大高度

B．探测器的发动机在25秒末关闭

C．探测器在25秒末落地

D．探测器上升的最大高度为800m

下图是一个遗传病的系谱图（假设该病受一对遗传因子控制，A是显性、a是隐性）：

III10遗传因子组成可能是（），她是杂合子的概率是（）

徽居建筑中的马头墙有什么功能用途？