标题: og -143 [打印本页] 作者: applemusic 时间: 2004-1-16 01:45 标题: og -143 143. 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 这个题选2是没错，但是我看og上的解释时候对3项有疑问 og上说的是3项改变的原来的意思，说3项的言外之意就是，除了有一种是development was independent of a common ancestor of mammals 还有一种是develop from a common ancestor of mammals 我怎么就看不出来这样的意思，能帮我说说么？
作者: shellyaaa 时间: 2004-1-16 07:18
B. 从共同祖先那里独立发展的type C. 它的发展过程与共同祖先不同。但也有可能还是从共同祖先那里独立发展的。 就与branch矛盾。