In preparation for the launching of Shenzhou Ⅶ, scientists need knowledge of weather cha

发布时间：2020-08-17 11:45:39

In      preparation for the launching of Shenzhou Ⅶ, scientists need      knowledge of weather changes.
A. the; the
B. a; ∕
C. ∕; a
D. the; a

网友回答

A. the; the
B. a; ∕
(答案→)C. ∕; a
D. the; a
解析：in preparation for 固定搭配；a knowledge of 某一门知识，这个时候可数。
以上问题属网友观点，不代表本站立场，仅供参考！