問題詳情
29. 數線上 A、B、C 三點所表示的數分別為 a、b、c， 且 C 在 
上。若 │a│=│b│， 
= 1：3，則下列 b、c 的關係式，何者正確？
(A) │c│=1/2│b│
(B) │c│=1/3│b│
(C) │c│=1/4│b│
(D) │c│=3/4│b│
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