Now satellites are helping to forecast (预报) the weather. They are in space,and they can reach any part of the world. The satellites take pictures of the atmosphere (大气层).because this is where the weather forms. They send these pictures to the weather station. So the scientists there can see the weather of any part of the world and tell how the weather will change.

  Today,nearly five hundred weather stations in sixty countries can receive satellite pictures. When they receive new pictures,they compare them with the earlier ones. They may find that the clouds have changed during the last few hours. This may mean that the weather on the ground may soon change , too. In the next weather forecast,they can tell people about it.

  So the weather satellites offer great help for the scientists at the stations. In the past,they could forecast the weather about 24 or 48 hours earlier. Now they can make good forecast for 3 or 5 days. Soon,perhaps,they may be able to forecast the weather for a week or more ahead (提前).

根据短文内容,选择正确答案。

(   ) 1. The weather forms      

A.  in any part of the world

B.  in the atmosphere

C.  in space

D.  on the ground

(   ) 2. Changing clouds in the atmosphere means______ .

A. it is a rainy day

B.  it is a windy day

C.  the weather will change

D. it is a sunny day

(   ) 3. Without satellites, scientists could forecast the weather for______ ahead.

A. a week or more

B.  1 or 2 days

C.  2 or 5 days

D. two weeks

(   ) 4. What does the underlined word"compare"mean in Chinese?

A.与……相似    B.将.•••••比作

C.交换       D.对比

(   ) 5. Which of the following is TRUE according to the passage?

A.  The satellites take pictures of the weather station.

B.  The weather forecast is quite exact.

C.  The weather satellites are now used in weather forecasting.

D.  Now the satellites can forecast the weather for a week.

 The computer was one of the most important inventions of last century. The first computer was like a room. Now some computers are as 1 as television sets. Some computers can even be made smaller than a book. About 20 years 2 , the computer was a strange machine inChina. Not many people 3 it and said "YES" to it.

  Today much of that is 4 . In 1984,when Deng Xiaoping watched two pupils working on the computers in Shanghai , he said that computer lessons  5 start from children.

So there was the first computer book for middle school students. Now 6 all middle schools have classrooms for computer courses. Some of the students now have their own computers at home. With the help of the Internet , they can send and 7 messages and e-mails,and they can learn about the world 8 .

  Now computers are widely used in banks,factories,airports and so on. The computer is coming into everyone's 9,so it is important for us to learn 10 to use a computer freely.
(   ) 1. A. huge    B. small

      C. great    D. little

(   ) 2. A. over    B. before

      C. long    D. ago

(   ) 3. A. understand    B. understood

      C. learn    D. learnt

(   ) 4. A. changing    B. moving

       C. turning    D. happening

(   ) 5. A. can    B. may

       C. would    D. should

(   ) 6. A. most    B. almost

      C. only    D. no

(   ) 7. A. receive    B. give

       C. do    D. make

(   ) 8. A. much quick    B. much quickly

       C. more quick    D. more quickly
(   ) 9. A. life    B. live

       C. lives    D. living

(   ) 10. A. when    B. where

       C. how    D. why

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