【单选题】齿轮传动中,齿面胶合常发生在哪种工作场合?( )
【判断题】自激振动约占切削加工中的振动的50%。A. 对 B. 错
【单选题】在闭式齿轮传动中,软齿面齿轮常发生____破坏,故常按____进行设计计算,按_____进行校核。
【简答题】在闭式齿轮传动中,软齿面齿轮常发生____破坏,故常按____进行设计计算,按_____进行校核。
【简答题】The best way to know about the world affairs and local news is to read newspaper__________ (regular).
【简答题】请听下面一段材料,回答第1-3题。 1. What does the woman want to know? A. The best way to go to New York. B. The quickest way to go to New York. C. The cheapest way to go to New York. 2. How much does it cost the wom...
【判断题】The best way to know the test is to do some real practice tests.