驱动装置主要由：电动机、减速器、驱动轮、联轴器和（）组成。
A、从动轮
B、定位器
C、制动器
D、逆止器
参考答案：C
Not only Jim but also my parents and I ______ a few places of interest since we came to China.
A．has visited
B．will visit
C．have visited
D．visited
预提费用属于()。
A.负债
B.资产
C.费用
D.收入
