
A.100MPa(压应力)
B.80MPa(压应力)
C.180MPa(压应力)
D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.100MPa(压应力)B.80MPa(压应力)C.180MPa(压应力)D.180MPa(拉应力)
[单选题]A.条件(1)充分,但条件(2)不充分。B.条件(2)充分,但条件(1)不充分。C.条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起
[单选题]A.一个解向量B.两个解向量C.三个解向量D.四个解向量