单项选择题
On no account（）to be exceeded.
A.is the S.W.L. of the crane
B.are the S.W.L. of the crane
C.the S.W.L. of the crane is
D.the S.W.L.of the crane are
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相关考题
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A.boom angle
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For any given pedestal crane，when the boom is lengthened，the lifting capacity is（）.
A.unchanged
B.increased
C.eliminated
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