prep181中关于species 单复数问题

181. 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d

请问species of cricket 中的 species的单复数？

觉得  , and it can in fact serve  这部分很别扭，但是其它选项差得更远。

是复数的，但是it这里指的是the numeber.

可以的哦，cricket仅仅是表示这种生物，species表示它的种类，前面有some，所以肯定是复数没有问题的;如果不是就会用a。

two new species of cricket of the Subfamily Nemobiinae....这个种类species不要求后面的动物一定是复数。

for example：some species of butterfly,or some butterfly species....