問題詳情
18. 設兩圓半徑分別為rr2，且r1＞r2，若兩圓外切時的連心線段長與兩圓內切時的連心線段長比為2：1，則r1:r2＝？
(A)2：
(B)3：
(C)4：
(D)3：2
(A)2：
(B)3：
(C)4：
(D)3：2
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增
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