题目内容
（请给出正确答案）
[主观题]
The difficulty in constructing tall buildings in the 19th century lies inA．the shortage of
The difficulty in constructing tall buildings in the 19th century lies in
A．the shortage of money.
B．the lack of a device to carry people upward.
C．backward technology.
D．mountains taking up land space.
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发布时间：2022-01-07
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