問題詳情
若 ac＞0，ab＜0，則直線 ax＋by＋c＝0 不通過哪一象限？
(A)第一象限
(B)第二象限
(C) 第三象限
(D)第四象限。
(A)第一象限
(B)第二象限
(C) 第三象限
(D)第四象限。
參考答案
答案：D
難度：適中0.683333
統計：A(5),B(12),C(21),D(82),E(0)
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