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【单选题】
以下关于外压圆筒,描述不正确的是( )。A.
失稳之前,筒壁内只有压缩压力。
B.
失稳时,伴随着突然的变形,在筒壁内产生以弯曲应力为主的复杂附加应力。
C.
失稳迅速发展到筒体被压瘪或发生褶皱,这不属于弹性变形。
D.
失稳迅速发展到筒体被压瘪或发生褶皱,这属于弹性变形。
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皮皮学刷刷变学霸
举一反三
【单选题】.--- What do you think of them? ---I like the first girl ______wears a blue skirt. She did ______of all.
A.
which, well
B.
who, better
C.
that, best
【单选题】What did the woman especially like to do?
A.
She liked to take a walk in the mountain.
B.
She liked to enjoy the silence.
C.
She liked to live in the cabin.
【单选题】— What ____ she ____? — She went to the doctor. [ ]
A.
is; doing
B.
did; do
C.
can; do
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