机械传动是采用带轮、齿轮、轴等机械零件组成的传动装置来进行能量的传递。
参考答案：对
集合A 中含有2个元素，集合A到集合A可构成 个不同的映射.
The more he knows about his new colleague, ______.
A．the much he likes to work with him
B．he likes to work with him more
C．the more he likes to work with him
D．the more does he like to work with him
