问题
问答题 简答题
轴承间隙过大、过小的缺点有哪些？（10分）
答案
参考答案：
轴承间隙过大，则车轮左右摇摆，从而加剧轮缘的磨损。轴承间隙小，使运行阻力增加，且润滑油不易进入滚动体间，无法形成油膜，轴承寿命将受到影响。可见，轴承间隙大时，正下方的滚珠受力将成倍的增加，从而加剧了滚珠粒的损坏。
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轴承间隙过大、过小的缺点有哪些？（10分）
参考答案：
轴承间隙过大，则车轮左右摇摆，从而加剧轮缘的磨损。轴承间隙小，使运行阻力增加，且润滑油不易进入滚动体间，无法形成油膜，轴承寿命将受到影响。可见，轴承间隙大时，正下方的滚珠受力将成倍的增加，从而加剧了滚珠粒的损坏。
| 完形填空。 It's said that many years ago clothes were made of animal skins. People started to wear clothes 1 they could keep themselves safe from the sun, wind, rain and cold. Today, we can use 2 materials (材料) to make different kinds of clothes. But clothes do 3 than keep us warm in modern society, and they can also 4 about our culture, our life, our jobs, our hobbies and even our mood (情绪). 5 , when we see a man in a uniform (制服), we know his 6 from the uniform. When we see a woman in a kimono (日本和服) , we may think that she is a _ 7 . If a man always wears sportswear, we may think he is _ 8 . and likes doing exercise. If a person __9 _ wears yellow or red clothes, maybe he or she is lively and easy-going. As the saying goes, "You are what you 10 ." | ||||
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