问题
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The only way to stop the spread of aerosols in the atmosphere, according to Dr. Rasool and
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Applications outside the Earth s atmosphere are clearly a good fit for robots. It is dan
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______the atmosphere around our Earth, we would not be able to live.A.Had it not been forB
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The sun must be made of lighter stuff than the earth. If the earth were______, it would we
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Just as the soil is a part of the earth ______ the atmosphere.A.as it isB.so isC.the same
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Scientists agree that we cannot stop the earth getting warmer.