设有关系R(A，B，C)，其函数依赖集F＝A→B，B→C，则关系R在函数依赖的范畴内

阅读理解。

     Not all memories are sweet. Some people spend all their lives trying to forget bad experiences. Wars and

traffic accidents can leave people with terrible physical and emotional (精神上的) hurts. Often they appear

again in dreams.

     Now American researchers think they are close to developing a drug which will help people forget bad

memories. The drug is designed to he taken immediately after a frightening experience. They hope it might

reduce or possibly erase (清除) the effect of painful memories.

     In November, experts tested a drug on people in the US and France. The drug stops the body producing

chemicals that fix memories in the brain. So far the research has suggested that only the emotional effects

of memories may be reduced, not all the memories are erased.

     The research has caused a great deal of argument. Some think it is a bad idea, while others support it.

     Supporters say it could lead to drugs that prevent or treat soldiers' troubling memories after war. They

say that there are many people who suffer from terrihle memories.

     "Some memories can ruin (毁坏) people's lives. They come back to you when you don't want to have

them in a dream. They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry

at Harvard Medical School. "This could reduce a lot of that suffering."

     But those who are against the research say that changing memories is very dangerous because memories

give us our identity (特质). They also help us all avoid the mistakes of the past."

     All of us can think of bad experiences in our lives that were horrible at the time but make us who we are.

I'm not sure we want to erase those memories," said Rebecca Dresser, a medical ethicist.

1. Now American researchers are trying to develop a drug to _______.

A. change people's bad memories into good ones

B. make people forget what happened in the past

C. help soldiers get away from troubling memories

D. treat people who suffer from terrible memories

2. The drug that have been tested on people can _______.

A. cause the brain to lose memories

B. reduce the effect of bad memories

C. help people improve their memories

D. totally erase the painful memories

3. Rebecca Dresser thinks that _______.

A. some memories can ruin people's lives

B. the drug can prevent people from sufferings

C. bad memories make us different from others

D. taking the drug will do harm to people's health

单剂量大于0.5g的药物不宜制备（）

A.注射剂

B.薄膜衣片

C.气雾剂

D.透皮给药系统

E.胶囊剂

—Ann, I am worried I’m getting fatter. What shall I do?

—I think you should eat________food and do more exercise.

A．more

B．less

C．much

D．little

甲乙两圆半径的比为2：3，周长的比是______：______，面积的比是______：______．

标准化是指为在一定的范围内获得最佳秩序，对实际的或潜在的问题制定共同和重复使用的规则的活动。主要是批制定标准、宣传贯彻标准、对标准的实施进行监督管理、根据标准实施情况修订标准的过程。标准化的目的和作用，都是通过制定和贯彻具体的标准来体现的。以下关于标准化的叙述，正确的是（）。

A.标准化是一个活动过程

B.这个过程是一次性的

C.是一个不断循环、不断提高、不断发展的运动过程

D.每一个循环完成后，标准化的水平和效益就提高一步

E.标准化是标准活动的产物