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问题 单项选择题

钢结构普通螺栓作为永久性连接螺栓使用时，其施工做法错误的是（）。

A.在螺栓一端垫两个垫圈来调节螺栓紧固度 

B.螺母应和结构件表面的垫圈密贴 

C.因承受动荷载而设计要求放置的弹簧垫圈必须设置在螺母一侧 

D.螺栓紧固度可采用锤击法检查 

答案

参考答案：A

解析：

考点:主体结构施工技术

普通螺栓施工工艺，不能设置两个及以上的垫圈。

阅读理解

阅读理解。

     Frank bought a new doorbell, but nobody seemed to notice it. When his friends came, they knocked

heavily at the door. Frank was not happy about it. One day a friend came to see Frank. He knocked at the

door loudly. Frank came to the door, but didn't open it. He shouted at the visitor from inside." I can't hear

you! Please ring the doorbell!"

根据短文内容,回答下列问题:

1. What did Frank buy?

______________________________________________________________

2. Why wasn't Frank happy?

______________________________________________________________

3. Who came to see Frank one day?

______________________________________________________________

4. Why didn't Frank open the door?

______________________________________________________________

5. Did Frank hear the knock?

______________________________________________________________
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B．用实际行动维护了国家、民族的尊严

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D．告诉我们无论在什么条件下，都不能做出有损国格、人格的事情
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