悬臂施工中,模板和支架是0号块施工的关键,其设计、施工主要的技术要求是:应有足够的刚

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问题:

悬臂施工中,模板和支架是0号块施工的关键,其设计、施工主要的技术要求是:应有足够的刚度和强度、便于操作,确保施工质量、施工偏差和定位要求应符合有关规范的规定,还有()

A.有足够的弯矩

B.足够的作业空间

C.准确计算在浇筑过程中结构的弹性变形和非弹性变形

D.施工进度要求快

考点:二建公路专业继续教育二建公路专业继续教育题库
题型:单项选择题

甲车每小时行48千米,乙车每小时行56千米,两车从相距12千米的两地同时背向而行,几小时后两车相距272千米?

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花生四烯酸衍生物中可以抗血栓的是

A.PGE2

B.PGF2

C.PGI2

D.TXA2

E.LTB4

题型:单项选择题

What did he do

A.He telephoned me.

B.He picked up the phone.

C.He put the receiver down.

D.He put my hanger up.

题型:单项选择题

When I was growing up, I was embarrassed to be seen with my father. He (1) severely crippled and very short, and when we would walk together, his hand on my arm (2) balance, people would stare. I would inwardly be afraid (3) squirm at the unwanted attention. If he ever noticed or was bothered, he never let (4) .
It was difficult to coordinate (5) steps - his halting, mine impatient - and because of that, we didn’t say much as we went along. But as we started out, he always said, "You (6) the pace. I will try to adjust to you. "
Our usual walk was to or (7) the subway, which was how he got to (8) . He went to work sick, and (9) nasty weather. He almost never missed a day, and would (10) it to the office even if (11) could not: a matter of pride!
He never talked about himself as an object of pity, (12) did he show any envy of the more fortunate or able. What he looked for in others was a "good heart", and if he found one, the owner was good enough for him.
Now that I am older, I believe that is a proper standard (13) which to judge people, even though I still don’t know precisely (14) a "good heart" is. But I know the times I don’t have one myself.
He has (15) gone many years now, but I think (16) him often. I wonder if he sensed my reluctance to be seen with him during our (17) . If he did, I am (18) I never told him how sorry I was, how unworthy I was, how I regretted it. I think of him when I complain about trifles, when I am (19) of another’s good fortune, when I don’t have a "good heart".
At such times I put my hand on his arm to regain my (20) , and say, "You set the pace, I will try to adjust to you.\

题型:单项选择题

焊缝作为一种缺陷,主要原因是在咬边处容易引起()。

A.未焊透

B.未熔化

C.应力集中

D.夹渣

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