题目内容

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

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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.

earnest, serious, severe1.We give _____ consideration to safety recommendations.2. I could tell she was speaking in _.3.Many people feel the punishment should have been more _______.