[問題] 考古題0101 Q13 (structure)

[ivygirl]

In geometry, an ellipse may be defined as the locus of all point ____
distances from two fixed points is constant.

(A) which as the sum of
(B) of the sum which
(C) whose sum of whose
(D) whose sum that the

I choose B but the answer is C
The answer makes me confused.
Please help me！

[liwuu]

推一下這一題
我覺得那個all point沒有加s就有點詭異了...
以橢圓的定義來看,答案是C!!
whose指的是前面的all point...

ps.橢圓定義為在同一平面,所有到相異兩固定點 F 及 F′之距離和為一定長的點所形成之圖形