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【单选题】
摩擦型高强度螺栓连接与承压型高强度螺栓连接( C )
A.
有本质差别
B.
工方法不同
C.
载力计算方法不同
D.
料不同
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A.
3:4
B.
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C.
3a:4b
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A.
奠定文明
B.
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C.
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D.
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