00-13怎么没人问？

Dinaxie

13. In geometry, an ellipse may be defined as the locus of all points -------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

网上的答案是A,自己也选的A，但是也有的地方写答案为C, 不明白的地方：

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

请问从句的主语是什么？

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

感觉意思正确，可第二个whose不需要谓语吗？

谢谢解答！

Dinaxie

看了一下讨论，看来A肯定是错了，个人觉得会不会是C写错了，应该是

whose of those

Cathelin

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

(A) which as the sum of

(B) of the sum which

(C) the sum of whose

(D) whose sum that the

答案：C ，whose引导的定语从句修饰all points。

分析: 空格前后有两个谓语，缺连词。空格前是个名词，空格应该是定语从句引导词， C对。the sum of whose结构中whose修饰名词distance，指代all points’。

(A) 定语从句结构完整，引导词可以为形容词、副词性引导词作状语或定语。

(B)which代词性从句引导词，在从句中做成分，代词+不完整句，这里空格后面的句子结构完整，of the sum which中先行词为the sum，which作它的定从引导词，所以不对，另外all points of the sum语义上也说不通。

(D)从句引导词有两个，可只有一个谓语，错。

参考译文：在几何学中，椭圆可以定义为一个这样的轨迹，2个固定点到它上面所有点的距离和是常数。

注意看C选项内容

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

请问从句的主语是什么？locus

Dinaxie

如果答案为C：

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

　all points 与the sume of 之间可以这样联系吗？>>