液压传动过程中一定要经过（）次能量转换。

To get … Water needed ...

问答题 To get … Water needed a kilogram of chocolate ______ a kilogram of beef ______ a kilogram of rice ______ a hamburger ______ an apple ______ a slice of bread ______
This article uses both gallon and liter as a unit of measurement for water. You will likely be most familiar with liter, as most of the world uses this unit of measurement for liquids. In the U.S. and the U.K., however, gallon is still commonly used. However, the size of one gallon differs in these two countries. In the U.K., the imperial gallon is about 4.5 liters. The U.S. gallon is about 3.8 liters. When gallon is used in this unit, it refers to the U.S. gallon.

倒圆角指令的快捷键是（） A、CB、FC、ED、P

单项选择题倒圆角指令的快捷键是（）

液压传动是在（）状态下，利用（）作为工作介质来传递（）的传动方式。

未知题型液压传动是在（）状态下，利用（）作为工作介质来传递（）的传动方式。