A.σ1=40MPa,ao=30° B.σ1=80MPa,ao=30° C.

资格题库2022-08-02  23

问题 A.σ1=40MPa,ao=30°B.σ1=80MPa,ao=30°C.σ1=40MPa,ao=60°D.σ1=80MPa,ao=60°

选项 A.σ1=40MPa,ao=30°
B.σ1=80MPa,ao=30°
C.σ1=40MPa,ao=60°
D.σ1=80MPa,ao=60°

答案 D

解析
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