One advantage of breeding African bees with other bee types (Africanization) may be resistance to the parasitic mite Varroa jacobsoni, a major threat to modern beekeeping. In parts of Europe, this mite is devastating honeybees and killing many colonies despite preventive measures by beekeepers. But in Brazil Varroa jacobsoni has been present in Africanized bees since 1972 without the loss of a single colony, even though beekeepers there undertook no preventive measures. The mites lay eggs within the brood cells of immature bees, and developing mites feed on the hemolymph (blood) of bee pupae. But fewer mites reproduce in Africanized bees than in European bees. Some researchers point out that this resistance may be related to the Africanized worker bee’s shorter development period, which prevents some mites from reaching maturity. Recently the mite has become a serious problem in colonies of European bees in North America. Africanization of these bees may be the best safeguard against this parasite.
The author’s argument regarding the resistance of Africanized bees to Varroa jacobsoni would be most weakened if which of the following were true?
(A) The bees in Brazil were resistant before being Africanized.
(B) The number of bee colonies in North American increased dramatically whereas the number in Brazil remained unchanged.
(C) Mites found in European bees reproduce at a faster rate than mites of identical species found in the bees in Brazil.
(D) Africanized bees retain many of the characteristics of European bees.
(E) Bee colonies in Europe continue to produce greater quantities of honey than do those in Brazil.
想问一下这道题的C选项。[attach]467789[/attach]
文章中说the resistance may be related to the A worker bee's shorter development period.
我的思路如图。横线表示各个物种的发育时间。上面的图表示文章中对于现象的解释。我想如果要削弱文章观点，并不是因为shorter development period，而是因为C的情况，即出现下面的图的情形。当两个品种的develop period的时间一样（即与文章中结论不符），mite in Europe 发育时间短，这也有可能导致E bee的死亡而A bee可以存活的情况啊啊。求解！！！
对了，答案是A，我也知道A是对的。。。作者: 岳然 时间: 2015-10-18 01:00:09
C选项里的reproduce at a faster rate说的是繁殖速度快，但其实你需要的意思是幼虫发育的速度快（mites reach their maturity at a faster speed/in a shorter period）