标题: 求教OG上两道关于平行&比较的题！！ [打印本页] 作者: 文刀刀 时间: 2016-9-27 15:33 标题: 求教OG上两道关于平行&比较的题！！ 第一道题：
In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing many more prescription for higher-cost drugs.
Correct answer: a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing
求教：平行结构为not just by...but also by 我当时一看不是not only..but also就没选，然后看了看资料，上面说还有一种是not...but...,如果两个都加by我可以理解，但是一个加上just，一个加上also我就不太懂了，不应该是加上一样的么？？
第二道题：
according to recent studies comparing the nutritional value of meat from wild animals and meat from domesticated animals, wild animals have less total fat than do livestock fed on grain and more of a kind of fat they think is good for cardiac health.
Correct answer: wild animals have less total fat than livestock fed on grain and more of a kind of fat thought to be
疑问：之前看到大神的语法资料，说主语比较 A do sth than B do; 宾语比较： A do C1 than do C2.
题目应该是wild animal和livestock比脂肪少，那应该是主语比较吧？为什么答案省略了do？不会有歧义嘛？？？