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【单选题】
倒车蜂鸣器或语音倒车报替器以及倒车灯要接通电源工作,必须（ ）。
A.
发动机点火开关打开
B.
离合器处于结合状态
C.
变速器换挡杆处于倒档位置
D.
变速器换挡扦处于空挡位置
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Some pessimistic experts feel that the automobile is bound to fall into disuse. They see a day in the not-too-distant future when all autos will be abandoned and allowed to rust. Other authorities, ho...
A.
How to render automobiles pollution-free.
B.
How to make smaller and safer automobiles.
C.
How to solve the problem of traffic jams.
D.
How to develop an automated subway system.