蜗杆传动的失效形式与齿轮传动相类似，其中（）最易发生。A.轮齿折断与塑性变形B.胶合与磨损C.点蚀与塑性变形D.点蚀与磨损 - 查题网

>> 高等继续教育 / 机械设计

高等继续教育 / 机械设计

正确率：100%

题型描述: 单选题

蜗杆传动的失效形式与齿轮传动相类似，其中（）最易发生。

A.轮齿折断与塑性变形
B.胶合与磨损
C.点蚀与塑性变形
D.点蚀与磨损

积分

机械设计

参考答案：

点击查看答案

佳题速递：

生药的性状鉴定内容有生药学

水泥试验，标准砂，拌和水及试模等的温度不必与实验室的温度相同。建筑材料

张爱玲的《流言》和苏青的《浣锦集》是抗战时期在沦陷区有代表性的散文作品。（） A、正确 B、错误中国现代文学

29. IS曲线上每一点都代表产品市场达到均衡，LM曲线上任一点都代表货币市场达到均衡。正确错误中石油

阿司匹林的不良反应不包括药理学

Trees mainly serve man in three important ways: They provide him with wood and other products; they provide him shade; and they help to prevent droughts and floods.Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important．In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind(固定) the soil, thus preventing it from being washed away easily；but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert.Two thousand years ago，a rich and powerful country cut down its trees to build warships, with which to gain itself an empire．It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation(饥荒)．In many places forests slowly disappear because _ _ _ _ _ _ _ _ _ _ . 大学英语（三）