请教补充教材SC324T，谢谢

兰蔻

324.Unlike most warbler species, the male and female
   blue-winged warbler are very difficult to tell apart.

  (A) Unlike most warbler species, the male and
      female blue-winged warbler are very difficult
      to tell apart.
  (B) Unlike most warbler species, the gender of the
      blue-winged warbler is very difficult to
      distinguish.
   (C) Unlike those in most warbler species, the male
       and female blue-winged warblers are very
       difficult to distinguish.
  (D) It is very difficult, unlike in most warbler species,
      to tell the male and female blue-winged warbler
      apart.
  (E) Blue-winged warblers are unlike most species of
      warbler in that it is very difficult to tell the
      male and female apart.
正确答案E，Blue-winged warblers 中心词为warblers，most species of
      warbler 中心词为species，这2者怎么完全对等呢？
是不是C更象正确答案？

siebel

Blue-winged warblers是种的概念，而不是个体概念。和species对应。另如：

长毛兔-其他种类的兔子 是对等的概念。

enjoy!

tocean0222

agree, the same difference as that between "primate" and "vertebrate"!