【单选题】开式齿轮传动的设计准则是______。
A.
按齿根弯曲疲劳强度设计,校核齿面接触疲劳强度
D.
按齿根弯曲疲劳强度设计,并考虑磨损的影响,将模数适当增大
【单选题】Russian-born Max Weber grew up in New York, studied art there, and then went back to Europe to familiarize himself with contemporary artistic developments, on returning to the United States, Weber wor...
C.
Works of the National Gallery of Art
D.
An Innovative American Artist
【判断题】齿面接触疲劳强度 和 齿根弯曲疲劳强度都属于疲劳强度。
【判断题】生产型增值税指计算增值税时,不允许纳税人扣除任何外购固定资产所含的已征增值税,
【单选题】Though Professor Liu ____ in New York for seven years, he has never regretted moving back to Shanghai, his hometown.
【单选题】对称循环的交弯应力作用下,构件的疲劳强度条件为:【图片】;若按非对称循环的构件的疲劳强度条件,【图片】进行了疲劳强度校核,则 。
C.
( C )是等价的,即非对称循环构件的疲劳强度条件式也可以用来校核对称循环下的构件疲劳强度;
D.
( D )不以说明问题,必须按对称循环情况重新校核。