The speed limit on this road is 80 kilometers per hour. The abbreviation for kilometers per hour is ___. A. kph B. km/h C. k/h D. kphr 相关知识点: 试题来源: 解析 B。本题考查速度单位千米每小时的缩写。km 表示千米,h 表示小时,中间用“/”连接,所以缩写为 km/h。
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