问题
选择题
It is that the play will be _____ in Beijing next month.[ ]
A. at
B. in
C. on
D. of
答案
答案：C
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It is that the play will be _____ in Beijing next month.[ ]
A. at
B. in
C. on
D. of
答案：C
的加速度竖直减速上升时，细绳对物体的拉力是 [ ]
