Which do you think is ________, health or wealth？

_______________will not continue if an ongoing operation is changed or deletedA、

液压泵是液压系统的动力元件,分为齿轮泵、 ____ 、 ____ 和螺杆泵。

液压泵是液压系统的动力元件,分为齿轮泵、 ____ 、 ____ 和螺杆泵。(本20

闭式软齿面齿轮传动主要失效形式是______,一般应按_____强度进行设计,然后再校核_____强度。

CB-B型齿轮泵中，泄漏途径有三条，其中（）对容积效率的影响最大。

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

And they can ______their passports______，making leaving or “escaping” virtually impossible.

当两个相互啮合的渐开线齿轮的中心距发生变化时,齿轮的瞬时传动比_____________。

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

闭式软齿面齿轮传动的主要失效形式为________。