问答题简答题：北京是个缺水的城市吗？

题型：阅读理解

阅读理解。

Air pollution comes from factories, power stations and cars. Chemicals in the smoke from power stations

cause a lot of damage (损害；毁坏). They can travel hundreds of miles in the wind before falling to the ground

in the rain. And this"chemical rain" gradually (逐渐地) destroys trees in the forests and kills fish in the lakes. In Germany, over 50% of the country's trees had been damaged by the year 1986.

Time and time again there are serious accidents that pollute the air. In 1986 there was a serious accident at

a nuclear power station in Russia. A cloud of radiation flew across the whole Europe. It is said that 125,000

people died in Russia as a result of illness caused by this accident.

In 1984 there was a serious accident at a factory in India and a cloud of dangerous gas covered the town

of Bhopal. Over 2,500 people were killed that night, and hundreds of thousands of people were injured (受伤

的). Many of the injured lost their sight.

1. Air pollution comes from _____.

A. factories

B. power stations

C. cars

D. all of the above

2. According to the passage, which sentence is right?

A. Chemicals in the smoke from power stations can't travel far in the wind.

B. "Chemical rain" is good for the trees.

C. Chemicals in the smoke from power stations are very safe.

D. "Chemical rain" is bad for our environment.

3. In Germany, how many trees had been damaged by the year 1986?

A. A quarter.

B. A half.

C. Three quarters.

D. A third.

4. What was the result of the accident that happened in Russia in 1986?

A. Over 2,500 people were killed.

B. Many people couldn't walk.

C. Many people lost their sight.

D. Compared with (同……比较) the accident in India, more people died.

5. From the sentence"Many of the injured lost their sight." we can know _____.

A. the gas covered the town of Bhopal at that time was poisonous (有毒的)

B. gradually the injured could see everything

C. many of the injured couldn't see anything any more

D. Both A and C

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题型：实验题

利用图1所示的装置可测量滑块在斜面上运动的加速度。一斜面上安装有两个光电门，其中光电门乙固定在斜面上靠近底端处，光电门甲的位置可移动，当一带有挡光片的滑块自斜面上滑下时，与两个光电门都相连的计时器可以显示出挡光片从光电门甲至乙所用的时间t，改变光电门甲的位置进行多次测量，每次都使滑块从同一点由静止开始下滑，并用米尺测量甲、乙之间的距离s，记下相应的t值；所得数据如下表所示。若滑块所受摩擦力始终相同。