
A.对
B.错
[单选题]A.1B.-1C.±1D.2E.±2
[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(2)单独都不充分,但条件(1)和条件(2)联合起来充分D
[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)联合起来充
[单选题]A.1B.-1C.±1D.2E.±2
[单选题]A.0.4倍轴心抗压强度时的荷载B.1/3轴心抗压强度时的荷载C.应力为0.5Mpa时的荷载D.应力为1.5Mpa时的荷载