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数学
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数学天下通24页不妨试试咋做
已知a是b的2分之1,试求下面各比的比值
a:b= a:(a+b)= b:a =
b:(a+b)=
人气:490 ℃ 时间:2020-02-04 07:29:40
解答
a:b=1:2
a:(a+b)=1:3
b:a =2
b:(a+b)=2:3
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