单项选择题
A.ⅠB.ⅡC.ⅢD.IV
A.CRTSⅢ型板式B.CRTSⅡ型板式C.CRTSⅠ型板式D.岔区板式
A.1650mmB.1750mmC.1850mmD.1950mm
A.80km/hB.120km/hC.160km/hD.200km/h
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