求助一道填空题！！！

sjlolitaUID: 3156063

新东方绿皮填空教程 补充练习Ex19-1
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.
A persist    D size
B expire      E redundancy
C degenerate   F symmetry

答案选 AE
我不太清楚第二个空 选E的话 该怎么理解 是不是涉及了相关方面的专业知识啊
挺困惑的 希望得到解答 谢谢咯！

苏梳眠UID: 2717864

分号表示两边的意思是重复的。
前面any vital function is restricted to a single kind of organ表明这中情况是不利的，则好的chances将会reduce，即persist的机会。
那么分号后重复的意思无非两种，any vital function is restricted to a single kind of organ的生物存活机会减少，或者非any vital function is restricted to a single kind of organ生物存活机会增加。
看到后面 possesses an enormous survival advantage，那么一定是非any vital function is restricted to a single kind of organ,也即redundancy。
re·dun·dan·cy    n.
1 a : the quality or state of being redundant : SUPERFLUITY b : the use of redundant components also : such components c chiefly British : dismissal from a job especially by layoff
2 : PROFUSION, ABUNDANCE
3 a : superfluous repetition : PROLIXITY b : an act or instance of needless repetition
4 : the part of a message that can be eliminated without loss of essential information

sjlolitaUID: 3156063

2# 苏梳眠
斑竹说的我详细 我懂了 感谢 :)

二双鱼二UID: 3234662

支持一个啊