OG-12-136

purple_soul_m

Whereas in mammals the tiny tubes that convey
nutrients to bone cells are arrayed in parallel lines, in
birds the tubes form a random pattern.

(A) Whereas in mammals the tiny tubes that convey
nutrients to bone cells are arrayed in parallel
lines, in birds the tubes

(8) Whereas the tiny tubes for the conveying of
nutrients to bone cells are arrayed in mammals
in parallel lines, birds have tubes that

(C) Unlike mammals, where the tiny tubes for
conveying nutrients to bone cells are arrayed in
parallel lines, birds' tubes

(D) Unlike mammals, in whom the tiny tubes that
convey nutrients to bone cells are arrayed in
parallel lines, the tubes in birds

(E) Unlike the tiny tubes that convey nutrients to
bone cells, which in mammals are arrayed in
parallel lines, in birds the tubes

此题正确选项是A .我的问题是，A选项whereas 是连词，前边是句子，后面是短语。这不是违反了平行的原则么？简直颠覆我对GMAT的认知！

sunfish223

算是省略么？@@

ripplesyi

form算动词吗？

purple_soul_m

马虎，明白

mickleon

BCD都有比较双方无法对比的问题
E的in mammals定于位置放的不好，表述不清
A正确清晰的比较了mammals的tubes和birds的tubes，所以选A好

luul65

后面的也是句子啊，form是动词嘛。

就是比较哺乳动物的tiny tubes是平行的线，但是鸟类的tubes是随机的花纹，比较这个~