题目内容

对于平面应力状态,由于只有x、y方向的应力作用,所以单元体在z轴方向上没有应变发生。

A. 对
B. 错

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正应力极值所在截面的切应力一定为零。

A. 对
B. 错

He kept complaining about everything, which really ______ us.

A. annoyed
B. annoys
C. annoying
D. annoy

People with high EQs often have positive _______ towards life.

A. gratitude
B. attitudes
C. appointment
D. altitude

All of us change our _______to fit different situations.

A. bestow
B. behave
C. behavior
D. beneath

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