单项选择题
A.80.1 B.-80.0 C.90.5 D.70.1
A.σtmax=34.0MPa<[σt],σcmax=57.6MPa<[σc] B.σtmax=40.3MPa<[σt],σcmax=34.0MPa<[σc] C.σtmax=57.6MPa>[σt],σcmax=40.3MPa<[σc] D.σtmax=34.0MPa<[σt],σcmax=40.3MPa<[σc]