在超越其他车辆前，你应该打信号多长时间？

419. 在超越其他车辆前，你应该打信号多长时间？

单选题正确率: 93%

A. 一秒钟 B. 两秒钟 C. 三秒钟 D. 只有在有车辆从你后面或迎面驶来时才打信号

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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