醉心公子
幼苗
共回答了20个问题采纳率:75% 举报
1、AC/CD=1/2,AC/CB=1/6,CD/DB=1/2,AC/AD=1/3,AD/AB=3/7,CD/CB=1/3
2、AC/AD=1/3.AC/CD=1/2...AC/DB=1/4...AC/AB=1/7..AC/CB=1/6
CD/CB=1/3..CD/DB=1/2...CD/AC=2..CD/AD=2/3..CD/AB=2/7
DB/CD=2/3..DB/AD=4/3..DB/AB=4/7..DB/AC=4..DB/CD=2
AD/DB=3/4..AD/CB=1/2..AD/AB=3/7
1年前
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