問題詳情
6.下列曲线中离心率为 
的是
(A).
(B).
(C).
(D).
的是(A).
(B).
(C).
(D).
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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