GWD-8-Q39:

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

B.    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

答案是A， 我认为A有错，不符合题意，请指教！！

 A非常对称。也可以用排除法：

B 不对称且for the conveying of 错误

C D unlike比较对象不对等

E  which从句修饰有歧义

个人意见！

同意楼上~~~~选A啦~~~

这题还是满好排除的!