单项选择题X 纠错
A.operated B.operate C.operating D.operator
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单项选择题
A.high B.heigh C.height D.higher
A.SLW B.LSW C.SWL D.FWE
A. safe working load B. safe work load C. safe worked load D. safely working load
A.What B.Where C.How D.When
A.upwards B.forwards C.downwards D.backwards
A.light B.bright C.tight D.dark
A. For two hours. B. At once. C. In the holds. D. Tomorrow.
A.look B.give C.keep D.see
A.should B.shouldn’t C.must D.can
A.care B.careless C.carelessness D.careful
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