（安徽安庆2009教学质量监测）Inpreparationf

（安徽安庆2009教学质量监测）In preparation for the launching of Shenzhou VII, 4、scientists need knowledge of weather changes.

A．the; the

B．a; /

C．/; a

D．the; a

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A．sacrifice

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A．developed

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A．conclude

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