一个火车司机在平地上能看7、8公里远?
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前方火车停车的尾部巨大红灯,在10公里远就能清晰可见地,。。。。
-europe-
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08/01/2011 postreply
16:40:35
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10公里是什么概念?晴天、没有坡度、弯道。你能保证出事路段恰好是10公里的直道?
-臭排副-
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08/01/2011 postreply
16:44:18
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知道红绿灯为啥要用红灯作为停车信号么?
-europe-
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08/01/2011 postreply
16:48:38
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