离合器是一种使主、从动轴接合或分开的（）。
A.连接装置
B.安全装置
C.定位装置
D.传动装置
参考答案：D
I guess Tom won’t keep on asking me the time from now on, as he has had ______.
A．his watch repaired
B．his watch repairing
C．repaired his watch
D．repair his watch
温度计的示值检定，根据其分度值的不同，检定点的间隔也不同。
