Question

Now satellites are helping to forecast the weather. They are in space, and they can reach any part of the world. The satellites take pictures of the atmosphere（大氣）, because this is where the weather forms. They send these pictures to the weather stations. So meteorologists（氣象學(xué)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 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．a(chǎn)bove the ground   D．a(chǎn)bove 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 in the atmosphere there

C．the weather forms in the atmosphere        D．the pictures can forecast the weather

3.Meteorologists forecast the weather __________.

A．when they have received satellite pictures

B．a(chǎn)fter comparing the pictures with earlier ones

C．before they received satellite pictures

D．while they study satellite pictures

4. The main 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 to the pictures

 

Answer 1

【答案】

1.A

2.C

3.B

4.D

【解析】

試題分析：文章主要講了氣象學(xué)家是如何利用氣象衛(wèi)星進(jìn)行天氣預(yù)報的。

1.根據(jù)第一段第二句They are in space可知衛(wèi)星是在太空中的，所以本題選A。

2.通過文章第三句The satellites take pictures of the atmosphere（大氣）, because this is where the weather forms.可知天氣形成于大氣層，所以本題選C。

3.通過文章第二段第二句When they receive new pictures, the meteorologists compare them with earlier ones.可知?dú)庀髮W(xué)家在比較之后才報天氣。所以本題選B。

4.通過閱讀可知本文主要講了衛(wèi)星通過拍照來預(yù)測天氣預(yù)報，所以本題選D。

考點(diǎn)：本題考查科普類文章

點(diǎn)評：本題的考查的題目，源于文章，但又必須通過閱讀，對文章加以理解方能得出答案，故本題有一定的難度。所以對于本文，應(yīng)該充分閱讀，盡可能從總體上把握文章的大意，還應(yīng)該結(jié)合一些生活常識。