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）.
【小題1】Satellites travel _____________.

A．in spaceB．in the atmosphereC．a(chǎn)bove the groundD．a(chǎn)bove space
【小題2】Why do we use the weather satellites to take pictures of the atmosphere? Because ________.
A．the weather satellites can do it easilyB．clouds form in the atmosphere there
C．the weather forms in the atmosphereD．the pictures can forecast the weather
【小題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
【小題4】 The main idea of this passage is that satellites are now used in _________.
A．taking pictures of the atmosphereB．receiving pictures of the atmosphere
C．doing other work in many waysD．weather forecasting to the pictures


【小題1】A
【小題2】C
【小題3】B
【小題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(bào)的。
【小題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。
【小題2】通過(guò)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。
【小題3】通過(guò)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(bào)天氣。所以本題選B。
【小題4】通過(guò)閱讀可知本文主要講了衛(wèi)星通過(guò)拍照來(lái)預(yù)測(cè)天氣預(yù)報(bào)，所以本題選D。
考點(diǎn)：本題考查科普類(lèi)文章
點(diǎn)評(píng)：本題的考查的題目，源于文章，但又必須通過(guò)閱讀，對(duì)文章加以理解方能得出答案，故本題有一定的難度。所以對(duì)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(shí)。

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