问题 填空题

汽车作为曾推动人类文明向前进步的产物,给人类生活带来舒适的同时,对环境的恶化也有难以推卸的责任,南方某市环境公报称:大气污染主要来源于汽车尾气。另据报道将氢气用于汽车发动机的技术已在我国研制成功,酒精作为燃料的汽车在北京试用,香港也大力推广汽车改用液化气作燃料。

(1)请写出汽车尾气中的一种大气污染物                                     

(2)请向这个市提一条治理汽车污染的合理化建议

                                                                          

答案

(1)一氧化氮 或一氧化碳

(2)限制汽车的数量;大力发展公共汽车的使用;汽车改用清洁环保型燃料;使用电力汽车‘汽车尾气使用催化净化装置处理后在排放(答案合理即可)

(1)一氧化氮或者一氧化碳都是汽车尾气的主要污染物;

(2)解决汽车污染的方法是少动用私家车,建议上下班步行或骑自行车代替汽车。

阅读理解

阅读理解 

     Have you ever seen people dance? Some dances are fast and others are slow. People's feet always

move when they dance. They keep on moving until the music stops.

     People have enjoyed dancing for a very long time.This story is of a different kind of dance. It is a

dance without people or music. Yet this dance is one of the oldest in the world. It is the dance of bees.

     If you have ever watched bees, you know that they are very clever. They also work hard looking for

food and bringing it back to their home.

     The home of the bees is called a beehive. Here hundreds even thousands of bees live. They work day

and night building small walls of wax. There they make their honey. This is the same honey that we eat.

     Where does the honey come from? Bees live on food from flowers. Have you seen bees flying around a flower garden? When a bee rests on a flower, it tries to go to the centre of it. There it takes in as much

food as its body can hold. Then it flies to take the food back to the hive.

     At the hive, bees change this flower food into honey. Then they fly away for more food.

     How do the bees know where to find the best food in the sweetest flowers? One bee acts as a guide.When it discovers good flowers, it flies back to the hive and tells the others. It does this by dancing for

them. The bee dances on one side. This tells the otherbees which way to go to find the flowers. But that is

not all. The bee dances for some time. And the length of its dance tells the other bees how far they must

fly to reach the flowers. When the bees see the dance, they know where the flowers are.

     They fly away and return with more food for the hive.

     Sometimes we hear the music of the bees as they fly around, but few people have ever seen them

dance. Yet without that dance we might never have sweet honey to eat.

1. The writer believes that       .

A. people dance better than bees

B. people learned dance from bees

C. bees dance more often than people

D. bees don't like music

2. From this passage we know that the dance of bees means      .

A. they are good at dance

B. they want to show their beauty

C. they communicate with each other

D. they have nothing to do

3. Which of the following is TRUE?

A. People get honey from flowers directly.

B. People draw honey from bees' bodies.

C. People produce honey in a secret place.

D. People get honey from bees indirectly.

4. What character do bees have?

A. Dance loving.

B. Hardworking.

C. Music loving.

D. Active.

5. If a bee wants to get some information about the distance of food, he may watch closely at       of the

other bees' dance.

A. the side

B. the length

C. the place

D. the time

单项选择题