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    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（大气）, because this is where the weather forms. 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 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）.
    小题1:Satellites travel ___________.
    A．in spaceB．in the atmosphere
    C．above the groundD．above space
    小题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 there
    C．the weather forms thereD．the pictures can forecast the weather
    小题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
    小题4:Maybe we’ll soon be able to forecast the weather for ________.
    A．one dayB．two days
    C．five daysD．seven days or even longer
    小题5: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

    小题1:A
    小题2:C
    小题3:B
    小题4:D
    小题5:D
    文章主要讲了卫星运用于气象
    小题1:A细节题，由第一段第二句They are in space可知卫星是在太空中的，故选A
    小题2:C细节题，文章第三句The satellites take pictures of the atmosphere（大气）, because this is where the weather forms.可知天气形成于大气层，故选C
    小题3:B细节题，文章第二段第二句When they receive new pictures, the meteorologists compare them with earlier ones.可知气象学家在比较之后才报天气故选B
    小题4:D细节题，文章最后一句Soon, perhaps, they may be able to forecast the weather for a week or more ahead可知气象预报可提前七天或更久，故选D
    小题5:D文章理解题，本文主要讲了卫星运用于天气预报，故选D
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    根据短文内容，选择最佳答案，并将其标号填入题前括号内。
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