Question

　　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 real 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 a-head.（提前）.

(1) Satellites travel ________.

[　　]

A．in space

B．in the atmosphere

C．above the ground

(2) Why do we use the weather satellites to take pictures of the atmosphere?

A．the weather satellites can do it easily

B．clouds form there

C．the weather forms there

(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 receive satellite pictures

(4) Maybe we'll soon be able to forecast the weather for ________

[　　]

A．one day

B．one days or more

C．five days

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

[　　]

A．taking pictures of the atmosphere

B．weather forecasting

C．doing other work in many ways

Answer 1

答案：A;C;B;B;B