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, birdshave tubes that
C. Unlike mammals, wherethe 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, whichin mammals are arrayed in parallel lines, in birds the tubes 作者: ai559031 时间: 2017-8-3 18:02
這一題是在比mammals跟bird的 tube
是比較主詞沒有錯