【单选题】【消耗次数：1】
地上放置一块钢筋混凝土板，在养护过程中表面出现微细裂缝，其原因是（ ）。
①
是收缩与徐变共同作用的结果
②
混凝土与钢筋产生热胀冷缩差异变形的结果
③
混凝土徐变变形的结果
④
混凝土收缩变形的结果
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相关题目
【单选题】
地面上顶制一块钢筋混凝土板，在养护过程中发现表面出现微细裂缝，其原因可能为（ ）。
①
混凝土与钢筋产生热胀冷缩差异变形的结果
②
混凝土受到外荷载的作用
③
混凝土干缩变形的结果
④
钢筋伸缩变形的影响
【单选题】
对于混凝土的徐变和收缩，下列说法正确的是（）。
①
徐变是受力引起的变形，而收缩是体积引起的变形
②
增大水胶比和水泥用量可以使混凝土的徐变及收缩都减小
③
徐变和收缩对混凝土结构都只是产生不利的影响
④
混凝土的徐变和收缩是同时产生的
【单选题】
钢筋混凝土构件的裂缝宽度是指（ ）。
①
受拉钢筋重心水平处构件底面上混凝土的裂缝宽度
②
受拉钢筋重心水平处构件侧表面上混凝土的裂缝宽度
③
构件底面上混凝土的裂缝宽度
④
构件侧面上混凝土的裂缝宽度
【单选题】
钢筋混凝土构件变形和裂缝验算中关于荷载、材料强度取值说法正确的是（ ）。
①
荷载、材料强度都取设计值
②
荷载取标准值，材料强度都取设计值
③
荷载取设计值，材料强度都取标准值
④
荷载、材料强度都取标准值
随机题目
【单选题】
His manner was so pleasant that Bolla felt at ____ with him at once.
①
peace
②
large
③
ease
④
best
【单选题】
Research findings show we spend about two hours dreaming every night, no matter what we _________ during the day.
①
must have done
②
would have done
③
should have done
④
may have done
【单选题】
Joseph was very lucky ____ with his life; he almost did not get out of the room.
①
to escape
②
to have escaped
③
to escaping
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to be escaping
【单选题】
The rescue team must have searched for the missing visitors
two days ago, _____?
①
mustn’ t they
②
haven’ t they
③
didn’ t they
④
hadn’ t they
【单选题】
____ is announced in the papers, our country has
launched a large scale movement against smuggling and fraudulent activities in foreign currency exchange deals.
①
What
②
As
③
Which
④
That
【单选题】
The ____ crown jewels are kept in the Tower of London.
①
valued
②
valueless
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invaluable
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usable
【单选题】
Though ____ rich, she was better off than at any other period in her life.
①
by means of
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within her means
③
by all means
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by no means
【单选题】
You ____ that letter to James. However, you didn’t.
①
ought to write
②
ought to have written
③
should write
④
should be writing