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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）.
    小题1:Satellites travel _____________.
    A．in spaceB．in the atmosphereC．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 easily
    B．clouds form there
    C．the weather forms there
    D．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 daysC．five daysD．seven days or even longer
    小题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

    小题1:A
    小题2:C
    小题3:B
    小题4:D
    小题5:D

    试题分析：本文主要讲述了现在利用气象卫星进行天气预报的方法，以及利用气象卫星进行天气预报的意义及应用前景。
    小题1:细节理解题。根据第一段第二句They are in space可知卫星是在太空中的，所以本题选A 。
    小题2:细节理解题。通过文章第三句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，所以本题选C 。
    小题3:细节理解题。通过文章第二段第二句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。所以本题选B 。
    小题4:细节题理解题。根据短文最后一段Soon, perhaps, they may be able to forecast the weather for a week or more ahead（提前）. 描述，可知很快我们就能提前预报七天甚至更长时间的天气了。故选D.
    小题5:主旨大意题。通过阅读可知本文主要讲了卫星通过拍照来预测天气预报，所以本题选D 。
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