单项选择题
对起重吊钩,当单钩的截面高度磨损达()时,应考虑报废更换。
A.2%
B.3%
C.4%
D.5%
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单项选择题
个性的( )是指人们对现实事物所持有的一定的看法和态度。
A.独特性
B.稳定性
C.差异性
D.倾向性
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单项选择题
The lecturer spoke very clearly so () we could hear every word.
A.that
B.which
C.where
D.in
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