把4.5,3,四分之三和二分之一四个数组成比例,其内项的积是（ ）.
把4.5,3,四分之三和二分之一四个数组成比例,其内项的积是（ ）.
数学人气：103 ℃时间：2019-11-22 17:14:16
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把4.5,3,四分之三和二分之一四个数组成比例,其内项的积是（9/4 ）.
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