题目内容

承受横向载荷或旋转力矩的紧螺栓联接,该联接中的螺栓_________。

A. 受剪切作用
B. 受拉伸作用
C. 受剪切和拉伸作用
D. 既可能受剪切作用又可能受拉伸作用

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为了改善螺纹牙上的载荷分布,通常都以_________的方法来实现。

A. 采用双螺母
B. 采用加高的螺母
C. 采用减薄的螺母
D. 减少螺栓和螺母的螺距变化差

当采用受剪螺栓联接承受横向载荷时,螺栓杆受到_________作用。

A. 弯曲和挤压
B. 拉伸和剪切
C. 剪切和挤压
D. 扭转和弯曲

一精致普通螺栓的螺栓头上标记着6.8(强度级别),则该螺栓材料的屈服极限近似为_____MPa。

A. 600
B. 800
C. 680
D. 480

vanish, disappear, evaporate(Directions:) Fill in the blanks with the words above. Change the form where necessary.1. Drugs won't make the pain _______altogether, but they will help.2. All hopes of finding the boy alive have _____.3. Hopes of achieving peace are beginning to ______.4. Before she could scream, the man had _____into the night.5. 13 year-old Nicola ______from her home on Saturday night.6. They then fan the water so that it ______and in doing so lowers the temperature.

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