题目内容

下面关于楼梯构造要求的叙述中,( ) 正确。

A. 每个梯段的踏步数在3~18步
B. 允许坡度23-45度
C. 足够通行宽度即可
D. 平台宽度不小于1.5m
E. 踏步高和踏步面宽之和一般为450mm

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But for your support then, I don’t think we ____the task.

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A. stay
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You ____ all right now if you____ to the doctor then.

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B. would have been; had listened
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A. was; go
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