在某个经常刮大风的海岛上有许多无翅或残翅的昆虫形成这种适应性是由于 A.自然选择 B.人工选择 C.海岛上食物中缺乏翅生长的物质 D.海岛 Template




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tomski在某个经常刮大风的海岛上有许多无翅或残翅的昆虫形成这种适应性是由于 a.自然选择 b.人工选择 coloring