10.In____preparation for the launching of Shenzhou spaceship, scientists need____knowledge of weather changes A. the, the B.a,/. C./,a D.the,a.

10.In____preparation for the launching of Shenzhou spaceship, scientists
need____knowledge of weather changes
A. the, the
B.a,/.
C./,a
D.the,a.

出自：四川农业大学大学英语

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