单项选择题
A.11/30 B.11；30 C.11：30 D.11.30
A.2017/5/1 B.5M1D C.5/1 D.5.1
A.123km123m B.123公里123米 C.K123+123 D.K123+123m
A.80km/h，45km/h B.80km/h，40km/h C.60km/h，45km/h D.60km/h，40km/h
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