求助一道机经上的阅读题

laoma19901990UID: 3276462

Ingestion of food containing spores of the pathogen Ascosphaera apis causes a fatal fungal disease known as chalk brood in honeybee larvae. However, larvae must be chilled to about 30°C(normal brood-comb temperature is 33-36°C)for the disease to develop.Accordingly, chalk brood is most common in spring and in small colonies. A recent study revealed that honeybees responsible for hive-temperature maintenance purposely raised the hives’ temperature when colonies were inoculated with A.apis this “fever,” or up-regulation of temperature, occurred before any larvae died, suggesting that the response is preventative and that either honeybee workers detect the infection before symptoms are visible or larvae communicate the ingestion of the pathogen. Temperature returned to normal by the end of the study, suggesting that increased temperature is not optimal when broods are not infected, as well as that the fever does not result merely from normal colony growth (i.e., an increase in the number of workers available for temperature maintenance).



The passage implies that if hive temperature had not returned to normal by the end of the study in question, a probable conclusion of the researchers would have been that

　　(A) up-regulation of temperature is a preventative measure against chalkbrood

　　(B) honeybees are incapable of purposely raising hive temperatures

　　(C) A. apis cannot be completely eradicated throughup-regulation of temperature along

　　(D) honeybee larvae have a mechanism to alert adult honeybees to the presenceof A. apis

　　(E) honeybee larvae may benefit from increased hive temperature even when there is no A.apis present 9
这题为啥选E？

inspire2014UID: 3127571

suggesting that increased temperature is not optimal when broods are not infected, 对这个结论取非就行了，也就是说broods没有被感染时，increased temperature并不是优先选择的，那么如果按提干所说实验结果相反，结论就是这种温度的升高是对整个honeybee是有益的，即便这没有感染的情况下.  供参考~

181921443UID: 3005341

最后一句吧.

pielangUID: 3284254

...跪了.感觉看了好几遍都不懂啊..

鱼想长大UID: 3336992

optimal对应benefit，最后一句话，

laoma19901990UID: 3276462

inspire2014 发表于 2012-10-18 00:38
suggesting that increased temperature is not optimal when broods are not infected, 对这个结论取非就 ...

哦，谢谢！！你说的很对！！

laoma19901990UID: 3276462

鱼想长大 发表于 2012-10-18 14:15
optimal对应benefit，最后一句话，

嗯，看懂了，谢谢！！