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【多选题】
挑梁的可能的破坏形态有（ ）。A.
因抗倾覆力矩不足引起绕 O 点转动的倾覆力矩破坏；
B.
因局部受压承载力不足引起的局部受压破坏 ；
C.
因挑梁本身承载力不足的破坏；
D.
因挑梁端部变形过大影响正常使用 。
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皮皮学刷刷变学霸
举一反三
【单选题】We just naturally think that the future will --------- the past .
A.
assemble
B.
vanish
C.
resemble
D.
contact
【单选题】Any lesson we teach naturally divide into different stages of activity and the main stages are: presentation, practice, production, reading, listening and ____.
A.
speaking
B.
writing
C.
comprehension
D.
revision
【简答题】One of the most difficult questions to answer is how much a job is worth. We naturally expect that a doctor’s salary will be higher than a bus conductor’s wage. But the question becomes much more diff...
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