单项选择题
图示单元体中应力单位为MPa,则其三个主应力为()
A.120,40,-30
B.120,30,-30
C.130,30,-30
D.80,50,-50
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单项选择题
图示单元体中应力单位为MPa,则其三个主应力为()
A.120,40,-30
B.120,30,-30
C.130,30,-30
D.80,50,-50
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