【单选题】【消耗次数：1】
混凝土强度等级C30表示：
①
混凝土的立方强度≥30N/mm2
②
混凝土的棱柱体抗压强度设计值≥30N/mm2
③
混凝土的轴心抗压强度标准值≥30N/mm2
④
混凝土的立方强度达30N/mm2的概率不小于95%
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相关题目
【单选题】
混凝土强度等级C30表示：
①
混凝土的立方强度≥30N/mm2
②
混凝土的棱柱体抗压强度设计值<imgwidth="17"height="24"v:shapes="_x0000_i1068"src="http://wljy.whut.edu.cn:80/uploadfiles/word/GCJG1.files/image065.gif">≥30N/mm2
③
混凝土的轴心抗压强度标准值<imgwidth="22"height="24"v:shapes="_x0000_i1069"src="http://wljy.whut.edu.cn:80/uploadfiles/word/GCJG1.files/image067.gif">≥30N/mm2
④
混凝土的立方强度达30N/mm2的概率不小于95%
【判断题】
混凝土的轴心抗压强度是采用150mm×150mm×500mm棱柱体作为标准试件，在标准条件（温度20℃±2℃，相对湿度为95%以上）下养护28d，采用标准试验方法测得的抗压强度值。（）
①
正确
②
错误
【单选题】
确定混凝土强度等级的依据是混凝土立方体抗压强度，其标准试件的尺寸是（）
①
100mm×100mm×100mm
②
150mm×150mm×150mm
③
200mm×200mm×200mm
④
150mm×150mm×300mm
【单选题】
某批混凝土经抽样，强度等级为C30，意味着该混凝土（）。
①
立方体抗压强度达到30N/mm2的保证率为95%;
②
立方体抗压强度均值达到30N/mm2
③
棱柱体抗压强度达到30N/mm2的保证率为95%
④
棱柱体抗压强度均值达到30N/mm2
【单选题】
混凝土立方体抗压强度试件的标准尺寸为（）。
①
100mm×100mm×100mm
②
150mm×150mm×150mm
③
200mm×200mm×200mm
④
70．7mm×70．7mm×70．7mm
【单选题】
根据《混凝土结构设计规范》的规定：混凝土立方体抗压强度标准值是指按照标准方法制作边长为150mm的立方体试件，养护( )d后，用标准试验方法测得的具有95%保证率的抗压强度。
①
7
②
21
③
28
④
30
随机题目
【单选题】
《关于建国以来党的若干历史问题的决议》对毛泽东的评价不包括（）。
①
A 毛泽东同志是伟大的马克思主义者
②
B 毛泽东同志是伟大的无产阶级革命家
③
C 毛泽东同志是伟大的无产阶级战略家和理论家
④
D 毛泽东同志是中国伟大的爱国者和民族英雄
【单选题】
He had a cottage which consists _____ three rooms, a bathroom and kitchen.
①
of
②
with
③
in
④
by
【单选题】
____ the diamond, he had to look for a place to hide it.
①
Having stolen
②
Having been stolen
③
Stolen
④
Stealing
【单选题】
In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover（火星控测飞行器）, ____ a new milestone（里程碑）in the history of mankind.
①
it marked
②
marking
③
marked
④
to mark
【单选题】
The dog, ____, will be made a good watchdog.
①
to train properly
②
being trained properly
③
properly to train
④
trained properly
【单选题】
The old farmer, ____ the badly injured and burnt soldier, came out of the burning farmhouse, calling continuously for help.
①
supporting
②
having supported
③
being supported by
④
being supported
【单选题】
____ the front door ____, he had to enter the room through the back door.
①
Seen; painted
②
Seeing; painted
③
Being seen; being painted
④
Seeing; being painted
【单选题】
When he was a boy, he used to go there and watch ____.
①
to repair bicycles
②
bicycles to be repaired
③
bicycles being repaired
④
repairing bicycles
【单选题】
—Have you considered ____ your job as a teacher? —Yes. I like the job because a teacher is often considered a gardener.
①
?to change; to be
②
?to change; being
③
?changing; being
④
?changing; to be
【单选题】
Every one of you is looking forward ___ getting a good result. Better think carefully before writing down your answers. Wish you success!
①
?on
②
? in
③
?to
④
? of