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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（大氣）, because this is where the weather forms. They send these pictures to the weather stations. So meteorologists（氣象學家）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 atmosphere
C．above the groundD．above 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 there
C．the weather forms thereD．the pictures can forecast the weather
小題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
小題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
小題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

小題1:A
小題2:C
小題3:B
小題4:D
小題5:D
文章主要講了衛星運用于氣象
小題1:A細節題，由第一段第二句They are in space可知衛星是在太空中的，故選A
小題2:C細節題，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，故選C
小題3:B細節題，文章第二段第二句When they receive new pictures, the meteorologists compare them with earlier ones.可知氣象學家在比較之后才報天氣故選B
小題4:D細節題，文章最后一句Soon, perhaps, they may be able to forecast the weather for a week or more ahead可知氣象預報可提前七天或更久，故選D
小題5:D文章理解題，本文主要講了衛星運用于天氣預報，故選D
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