264. Scientists believe that unlike the males of most species of moth, the male whistling moths of Nambung, Australia, call female moths to them by the use of acoustical signals, but not olfactory ones, and they attract their mates during the day, rather than at night.

(A) by the use of acoustical signals, but not olfactory ones, and they attract

(B) by the use of acoustical signals instead of using olfactory ones, and attracting

(C) by using acoustical signals, not using olfactory ones, and by attracting

(D) using acoustical signals, rather than olfactory ones, and attract

(E) using acoustical signals, but not olfactory ones, and attracting

In A and E, the comparison between most male moths and the male whistling moth is not clear>????????

The use of but not does not clearly convey that most other moths use olfactory signals

not,but not ,rather than 意思上有区别吗?

ETS经常用rather than,但也用过 but not和but,不是吗??

首先选项是比出来的，but not ,rather than 意思上的区别这里也就如og所说The use of but not does not clearly convey that most other moths use olfactory signals，而rather than does convey...

简单的判别: 在其它相同的情况下，公理rather than>instead of/but not/not通常是成立的。

楼上的说的很具体了，但是，我做到过一定要BY的，表示是通过什么什么的方法，我发现有很多的ETS出的题目都是，有问题的。所以我严重同意楼上说的答案是比较出来的.