问题 问答题 简答题

外来化合物对机体产生的损害作用具有哪些特点?

答案

参考答案:

1.机体的正常形态、生长发育过程受到严重影响,寿命缩短;

2.机体的功能容量或对额外应激状态的代偿能力下降;

3.机体内稳态的功能下降;

4.机体对其他某种环境因素不利影响的易感性上升。

阅读理解

阅读理解.

     A story is told about a soldier who was finally coming home after having fought in Vietnam. He

called his parents from San Francisco. "Mom and Dad, I'm coming home, but I've a favor to ask.

I have a friend. I'd like to bring home with me."

     "Sure," they replied, "we'd love to meet him." "He was hurt pretty badly in the fighting. He lost a

arm and a leg. He has nowhere else to go, and I want him to live with us." "I'm sorry to hear that,

son. Maybe we can help him find somewhere to live."

     "No. Mom and Dad, I want him to live with us."

     "Son," said the father, "you don't know what you're asking. Someone with such a handicap would

be a temble burden (负担) on us. We have our own lives to live, and it's very hard for us. I think you

should just come home and forget about this guy. He'll find a way to live himself."

     At that point, the son hung up the phone. The parents heard nothing more from him. A few days

later, however, they received a call from the San Francisco police. Their son had died after falling from

a building, they were told. The police believed he killed himself. The parents flew to San Francisco but

to their surprise they discovered something they didn't know — their son had only one arm and one leg.

1. Why was the man in the story hurt at the beginning?

A. Because he was hurt in an accident.

B. Because he fell from a tall building.

C. Because he went to a war.

D. Because he fought with someone.

2. Who is the wounded man that the soldier told his parents?

A. His friend.

B. The soldier himself.

C. Another soldier.

D. His brother.

3. It's _____ for the parents to help the poor man.

A. kind

B. kind-hearted.

C. unconcerned

D. careful

4. What does the underline word "handicap" mean?

A. 缺陷

B. 责任

C. 妨碍

D. 障碍

5. The passage wants to tell us we should _____ the people who in convemence us or make us feel

    uncomfortable.

A. hate

B. love

C. trouble

D. not care for

单项选择题