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The successful launch of Tiangong­1 symbolizes a further step for China to join in the________of space stations previously mastered by Russia and the US.
A.invention B.production
C.operation D.preparation
C
考查名词辨析。句意:“天宫1号”的成功发射使中国向空间站的运作更近了一步,空间站技术先前只有俄罗斯和美国掌握。operation“运行,操作”,符合语意。
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