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. Whereas暗含对比,需要结构相同,功能相对,形式对称 A. !Whereas in mammals the tiny tubes that convey nutrients to bone cells are arrayed in parallel lines, in birds the tubes--- in mammals the tiny tubes ><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------ the tiny tubes ><birds不平行
C. Unlike mammals, where the tiny tubes for conveying nutrients to bone cells are arrayed in parallel lines, birds’ tubes------- mamals><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------- mammals><the tubes 不平行
E. Unlike the tiny tubes that convey nutrients to bone cells, which in mammals are arrayed in parallel lines, in birds the tubes--------- the tiny tubes><in birds 不平行
那这道捏?? -- by 会员 鸡腿 (2011/8/13 20:46:07)
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