问题
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Meteorologists forecast the weather______． A．when they have received satellite
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They were successful ______ a communication satellite.A、launchB、to launchC、in launching
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From thousands of kilometers above our earth, a communications satellite ______ a signal f
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It was three years after the first satellite launching that a （spaceship) containing a
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A satellite orbiting around the earth was
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A satellite 【orbiting】 around the earth was launc
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