问题
单项选择题
0n 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
答案
参考答案：A
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0n 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
参考答案：A