单项选择题
简支梁如下所示,其跨内最大弯矩是下列哪一个数值?( )
A.40.0kN·m
B.45.0kN·m
C.60.0kN·m
D.120.0kN·m
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单项选择题
How long must the GMDSS radio log be retained on board ________.A.At least two years after the last entryB.At least one year after the last entryC.At least 90 days after the last entryD.At least 30 days after the last entry
A.A.At
B.At
C.At
D.At
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问答题
查封违法设施是行政主体作出的 行为。
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