下面哪一项不是汽车电子防盗系统的组成部分（）
A.开关和传感器
B.ECM
C.IMMBOECU
D.执行机构
参考答案：B
--- Did you understand what the teacher said ?
---Yes! She explained the text in detail to make her lessons __________.
A．easy understood
B．easily to understand
C．easily understood
D．easy understand
我国人口最多的少数民族是[ ]
A．回族
B．壮族
C．蒙古族
D．维吾尔族
