请教比较中关于主语省略的问题

kathygu_jing

不如说，companies in the US are providing jobs training and general education for nearly eight million people, about as many as are enrolled in the nation's four-year colleges and universities
当中，as many as后面的主语被省略了没错。
那么，下面的句子对么?
   vehicles powered by natural gas emit fewer of certain pollutants than do burning gasoline or diesel fuel.

turtlechen

又见比较省略。
有无人可以协助将这种as 形容词 as 及 more / adj er ... than 的句法問題整理羅列一下呢！
感谢！

[此贴子已经被作者于2004-1-17 18:17:19编辑过]

dreadpower

总结？？？呵呵，想法好啊~~~