这个标志是什么意思？

355. 这个标志是什么意思？

单选题正确率: 89%

A. 因为前方有事故，所以车速不得超过 50 公里/小时 B. 因为前方有事故，所以车速不得超过 20 公里/小时 C. 停车，直到有人移除该标志 D. 该标志无效——它们只能是蓝色背景配白色文字

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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