道路施工速度限制标志何时适用？

154. 道路施工速度限制标志何时适用？

单选题正确率: 75%

A. 仅当有工人在场时 B. 在所有时间 C. 道路施工速度限制只是建议性的 D. 仅在白天

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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