问题 问答题

简述水对人类的重要性。

答案

参考答案:水是人类重要的环境因素之一,是人体生命活动不可缺少的物质,是构成人体的主要组成成分,人体内的生理、生化活动都是在水的参与下完成,如人体体温调节,营养物质的吸收、输送,废弃物的排泄等都离不开水。当机体散失水分达体重的 2%以上时,即可以引起脱水。此外,工农业生产、环境卫生、个人卫生都需要大量的水。由此可见,水是人类赖以生存,必不可少的自然资源,且它具有不可替代性。水资源作为整个生态环境的一个重要组成部分,既与天气、气候的关系十分密切,同时也是影响经济文化生活、城市兴旺发达的制约因素之一。

阅读理解

阅读理解。

     Everyone needs friends. We all like to feel close to someone.lt is nice to have a friend to talk, to

laugh, and to do things with. Surely, there are times when we need to be alone. We don't always want

people around. But we would feel lonely if we never had a friend.

     No two people are the same. Sometimes friends don't get along well. That doesn't mean they no

longer like each other. Most of the time they will go on being friends.

     Sometimes friends move away. Then we feel very sad. We miss them very much. But we can call

them and write to them. It could be that we would never see them again. And we can make new friends.

It is surprising to find out how much we like new people when we get to know them.

     Families sometimes name their children after a close friend. Many places are named after men and

women who have been friendly to people in a town. Some libraries are named this way. So are some

schools. We think of these people when we go to these places.

     When we have friends, we will be very happy. Being happy helps us stay well. Or it could be just

knowing that someone cares. If someone cares about us, we take better care of ourselves.

1. The first paragraph (段) tells us _____.

A. no one needs friends

B. we always need friends around us

C. making friends is the need in people's life

D. we need to be alone

2. In the passage the writer doesn't tell us that _____.

A. people are unhappy when their friends leave them

B. people will never see their friends after their friends move away

C. people can know their friends in different ways

D. people like their new friends very much if they get to know them

3. People will not name a _____ after friendly people.

A. city

B. room

C. town

D. badthing

4. When people have friends they will _____.

A. feel happy and healthy

B. get a lot of help from their friends

C. take better care of themselves

D. A and C

5. The main idea of this passage is _____.

A. that people are all friends

B. that people need friends

C. how to get to know friends

D. how to name a place