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题型:单选题 题类:常考题 难易度:普通
(1)950mm= {#blank#}1{#/blank#} m
(2)200m/s= {#blank#}2{#/blank#} km/h
(3)15min= {#blank#}3{#/blank#} s
(4)0.6kg= {#blank#}4{#/blank#} g
(5)0.8g/cm3= {#blank#}5{#/blank#} kg/m3 .
选择理由:{#blank#}2{#/blank#}.
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