这个标志是什么意思？

477. 这个标志是什么意思？

单选题正确率: 97%

A. 允许掉头 B. 前方有环形交叉路口 C. 前方允许右转 D. 前方有道路施工

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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