143. Recently discovered fossil remains strongly suggest that the Australian egg-laying mammals of today are a branch of the main stem of mammalian evolution rather than developing independently from a common ancestor of mammals more than 220 million years ago. (A) rather than developing independently from (B) rather than a type that developed independently from (C) rather than a type whose development was independent of (D) instead of developing independently from (E) instead of a development that was independent of independent from和 of的意思不是一样的么,BC选项的差别在哪里呢? |