天山新题20-——还是有疑问：（

20.   uritan fanatics brought to civil and military affairs a coolness of judgment and mutability of purpose that some writers have though inconsistent with their religious zeal, but which was in fact a natural outgrowth of it.

(A) but which was in fact a natural outgrowth of it

(B) but which were in fact a natural outgrowth of it

(C) but which were in fact natural outgrowths of it

(D) but it was in fact a natural outgrowth of them

(E) which was in fact a natural outgrowth of it

我想确认一下mutability of purpose 前是否需要加a?谢谢！

a coolness of judgment and mutability of purpose结构中mutability of purpose前的确有a这个冠词的需要，但是由于coolness前有了a，我们也可以省略后面一个重复出现的a，以使句子更为紧凑，但是，我们要知道后面的a是被省略了，而不是前面一个a同时修饰后面两个名词结构。

你的理解是正确的。

原来是这样！哦！！！

谢谢石头哥哥！！！