In some species of cricket, the number of chirps per minute used by the male for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve as an approximate thermometer.
(A) for attracting females rise and fall in accordance with the surrounding temperature, and they can in fact serve
(B) for attracting females rises and falls in accordance with the surrounding temperature, which can in fact serve
(C) in attracting females rise and fall in accordance with the surrounding temperature, in fact possibly serving
(D) to attract females rises and falls in accordance with the surrounding temperature, and it can in fact serve
(E) to attract females rises and falls in accordance with the surrounding temperature, in fact possibly serving
答案是D,我选E;
不知道如何区分D, E选项.
E项中既然前后同一个功能,即前面的the number of chirps...with the surrounding temeprature是后面未画线theromometer的解释,为何不能用,doing在句未表伴随结果;
http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=246511&replyID=2316584&skin=1
请先搜索以前的讨论贴,谢谢.
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