在你变换车道之前你必须做什么？

282. 在你变换车道之前你必须做什么？

单选题正确率: 85%

A. 回头看看你的肩膀 B. 检查你的后视镜 C. 至少打三秒钟的转向灯 D. 以上所有

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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