【多选题】【消耗次数：1】
根据试验梁的F-w曲线上的转折点，可把梁的受力和变形全过程分为三个阶段，包括（）。
①
梁没有混凝土裂缝阶段;
②
梁混凝土裂缝出现与开展阶段;
③
钢筋拉断阶段;
④
裂缝急剧开展，纵向受力钢筋应力维持在屈服强度不变，为梁破坏阶段。
参考答案：
复制
纠错
相关题目
【单选题】
钢筋混凝土梁受拉区边缘开始出现裂缝是因为受拉边缘（ ）。
①
受拉混凝土的应力超过混凝土的实际抗拉强度
②
受拉混凝土的应变达到混凝土的极限拉应变
③
受拉混凝土的应力达到混凝土的抗拉强度设计值
④
受拉混凝土的应力达到混凝土的抗拉强度标准值
【单选题】
钢筋混凝土梁的受拉区边缘（ ）时，受拉区开始出现裂缝。
①
达到混凝土实际的抗拉强度
②
达到混凝土抗拉标准强度
③
达到混凝土抗拉设计强度
④
达到混凝土弯曲抗拉设计强度
随机题目
【单选题】
The engineers are going through with their highway project, ____the expenses have risen.
①
even though
②
just because
③
now that
④
as though
【单选题】
A police officer claimed he had attempted to ____ paying his fare.
①
avoid
②
reject
③
refuse
④
neglect
【单选题】
The students were not____ to leave the classroom without an adequate reason.?
①
permitted ?
②
remitted ?
③
admitted ?
④
emitted?
【单选题】
It was a minor illness, and she soon ____ it. ?
①
got over ?
②
got on with ?
③
got around ?
④
got out ?
【单选题】
Our English teacher demanded that we ____ to English broadcast every day.
①
listening
②
would listen
③
listen
④
could listen
【单选题】
He ____ have left the campus, for I saw in the classroom just a minute ago
①
mustn’t
②
shouldn’t
③
couldn’t
④
oughtn’t
【单选题】
There isnt any difference between the two. I really dont know ____.
①
where to choose
②
which to choose
③
to choose what
④
to choose which
【单选题】
If we hadn’t got a lift, we ____ the top flat so soon.
①
would not reach
②
can not reach
③
could not have reached
④
will not reach
【单选题】
With the old man____ the way, we had no trouble in finding that mysterious cave.
①
lead
②
to be led
③
leading
④
led