试题 试卷
题型:填空题 题类:常考题 难易度:容易
1m/s= {#blank#}1{#/blank#} km/h
1km/h= {#blank#}2{#/blank#} m/s
72km/h= {#blank#}3{#/blank#} m/s
12m/s= {#blank#}4{#/blank#} km/h.
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