你觉得每年降低事故的发生率达到多少为合理？需要多少年达到美国同样的交通事故率为合理？

来源: lisi 于 2015-08-16 15:15:27 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.