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问题
填空题
上升限位器的设置应能保证当取物装置最高点距定滑轮最低点不小于()处断电停机。
答案
参考答案:0.5m
选择题
More and more old people go to the universities for the aged in order to avoid _____ from the outside world.
A. cutting off
B. being cut off
C. to cut off
D. to be cut off
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问答题
坎儿井
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