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题库 / OG2017V-SC-244
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.
rather than developing independently from
rather than a type that developed independently from
rather than a type whose development was independent of
instead of developing independently from
instead of a development that was independent of
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