9. The chances that a species will ____ are reduced if any vital function is restricted to a single kind of organ;____ by itself possesses an enormous survival advantage.
GRE网络课堂词汇填空笔记-沈辉主讲(六)
9. The chances that a species will ____ are reduced if any vital function is restricted to a single kind of organ;____ by itself possesses an enormous survival advantage.