PREP1里面几个语法题 请大家帮助一下：）--5，6

5. Sulfur dioxide, a major contributor to acid rain, is an especially serious pollutant because it diminished the respiratory system's ability to deal with all other pollutants.

其中一个选项： an especially serious pollutant because it diminished the capability of the respiratory system ro deal with , 为何不对呢？

6 In A.D 391, resulting from the destruction of the largest library of the ancient world at Alexandria, later generations lost all but the ** and ^^ among Greek epics, most of the poetry of @@ and $$, and dozens of plays by A and B. (不好意思，这些名词没有抄下来，不太影响阅读意思吧？)

A 原句

D as a result of the destruction of the liberary at Alexandria, the largest of the ancient world.

请问：A 的错误是不是这样的----at Alexandria 跟在ancient world后面就修饰了ancient world, 逻辑意思不对。at Alexandria 应该是放在liberary后面，从而修饰liberary。是这样嘛？

5：ability 优于capability(目前只能想到这一点···)

6：位于句首的doing的逻辑主语为主句主语，则resulting from 的逻辑主语为later generations, 歧义