试题 试卷
题型:单选题 题类:常考题 难易度:普通
5.6 {#blank#}1{#/blank#}3.1×5.6
7.5 {#blank#}2{#/blank#}7.5÷1.01
{#blank#}3{#/blank#}2.757
2a {#blank#}4{#/blank#}a2(a=2)
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