【单选题】There are ________ people in the supermarket ________ we can’t buy things quickly.
【简答题】在齿轮传动设计时,软齿面闭式传动常因()而失效,故通常先按()强度设计公式确定传动的尺寸,然后验算齿轮的()强度。
【简答题】齿轮传动设计时,应首先按主要失效形式进行强度计算。闭式软齿面齿轮传动常因为 而失效,故通常先按 确定传动的尺寸,然后验算齿根弯曲疲劳强度。
【多选题】下列有关原函数和导数的联系,说法正确的是:
【简答题】Module I Listening Tasks Task 1 Directions: In this task there are some key words taken from the sentences concerning How to Fit Yourself to the New Work . First, you should listen to the key words ma...