After 1953 ______ people have succeeded

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问题选择题

After 1953 ______ people have succeeded in climbing the mountain.

A. several hundred of
B. several hundreds
C. several hundreds of
D. several hundred

答案

答案：D

选择题

在房间里谈话比在旷野里谈话听起来响亮，这是因为[ ]

A.房间里的空气不流动，不利于声音的传播

B.旷野的空气比较稀薄

C.在房间里回声和原声混在一起，使原声加强

D.以上说法都不对

问答题简答题

简述西周时期农业生产观念。