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【单选题】
计算紧螺栓联接时的拉伸强度时，考虑到拉伸与扭转的复合作用，拉伸载荷增加到原来的()倍。A.
1.1
B.
1.25
C.
1.3
D.
1.4
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反馈参考答案：
举一反三
【单选题】（）适用于扑救油脂类、石油产品及固体物质的初起火灾，不适用于扑救带电设备和轻金属的火灾。
A.
泡沫灭火器
B.
二氧化碳灭火器
C.
四氯化碳灭火器
D.
1211灭火器
【多选题】下列关于二氧化碳灭火器描述正确的是:
A.
适用于低压电器设备、仪器仪表、工艺品、陈列品
B.
可放置在图书馆，发电机房等场所
C.
可适用于轻金属火灾的扑救
D.
使用推车式二氧化碳灭火器应戴手套或用衣物垫住，防止冻伤
【单选题】_________ yesterday,we went out for a walk.
A.
As a fine day
B.
It was a fine day
C.
It being a fine day
D.
For it was a fine day
【单选题】yesterday，we went out for a wall
A.
As a fine day
B.
It was a fine day
C.
It being a fine day
D.
For it was a fine day
【简答题】__________ yesterday,we went out for a walk. A.As a fine day B.It was a fine day C.It being a fine day D.For it was a fine day
【简答题】完形填空。 A peacock and a nightingale It was a fine day. A peacock was dancing happily in the forest. He began to __ 1 __ suddenly because he saw a nightingale __ 2 __ in a tree. He said to the nighting...
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