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), because this is where the weather forms(形成). 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 the new pictures. When they receive the new pictures,they compare(比较) them with the earlier ones. Perhaps 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 their next weather forecast, they can tell people about it.

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

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．a rainy day

B．a windy day

C．that the weather will change

D．a sunny day

3．Without satellites, scientists could forecast the weather for ________ ahead.

[　　]

4．The main(主要的) idea of this passage is that satellites are now used in ________.

[　　]

A．taking pictures of the atmosphere

B．many ways

C．receiving pictures of the atmosphere

D．weather forecasting

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）, because this is where the weather forms（形成）. They send these pictures to the weather stations. So meteorologists（气象学家）can see the weather of any part of the world. From the pictures, the scientists can often say how the weather will change.

Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare（比较）them with earlier ones. Perhaps 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 their next weather forecast, the meteorologists can say this.

So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon, perhaps, they may be able to forecast the weather for a week or more ahead（提前）.

1. Satellites travel _____________.

   A. in space                                             B. in the atmosphere

   C. above the ground                               D. above space

2. Why do we use the weather satellites to take pictures of the atmosphere? Because __________.

   A. the weather satellites can do it easily

   B. clouds form there

   C. the weather forms there

   D. the pictures can forecast the weather

3. Meteorologists forecast the weather __________.

   A. when they have received satellite pictures

   B. after they have compared new satellite pictures with earlier ones

   C. before they received satellite pictures

   D. during they study satellite pictures

4. Maybe we’ll soon be able to forecast the weather for ________.

   A. one day                               B. two days

   C. five days                              D. seven days or even longer

5. The main（主要的）idea of this passage is that satellites are now used in _________.

   A. taking pictures of the atmosphere      B. receiving pictures of the atmosphere

   C. doing other work in many ways        D. weather forecasting

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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）, because this is where the weather forms（形成）. They send these pictures to the weather stations. So meteorologists（气象学家）can see the weather of any part of the world. From the pictures, the scientists can often say how the weather will change.

Today, nearly five hundred weather stations in sixty countries receive satellite pictures. When they receive new pictures, the meteorologists compare（比较）them with earlier ones. Perhaps 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 their next weather forecast, the meteorologists can say this.

So the weather satellites are a great help to the meteorologists. Before satellites were invented, the scientists could forecast the weather for about 24 or 48 hours. Now they can make good forecasts for three or five days. Soon, perhaps, they may be able to forecast the weather for a week or more ahead（提前）.

56. Satellites travel _____________.

A. in space                               B. in the atmosphere

C. above the ground                   D. above space

57. Why do we use the weather satellites to take pictures of the atmosphere? Because __________.

A. the weather satellites can do it easily             B. clouds form there

C. the weather forms there                        D. the pictures can forecast the weather

58. Meteorologists forecast the weather __________.

A. when they have received satellite pictures

B. after they have compared new satellite pictures with earlier ones

C. before they received satellite pictures

D. during they study satellite pictures

59. Maybe we’ll soon be able to forecast the weather for ________.

A. one day                              B. two days

C. five days                            D. seven days or even longer

60. The main（主要的）idea of this passage is that satellites are now used in _________.

A. taking pictures of the atmosphere             B. receiving pictures of the atmosphere

C. doing other work in many ways              D. weather forecasting