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家庭作业
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运输基础/家庭作业
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来自维基教科书,一个开放的世界中的开放书籍
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运输基础
家庭作业
[
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编辑源代码
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1. 在什么情况下环形交叉路口可能被认为比交通信号灯或标志或立交桥更有效?
2. 环形交叉路口的缺点有哪些。
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书籍:运输基础/家庭作业
华夏公益教科书