新GRE阅读理解36套每日讨论--74（qq群178674184）

普渡哥

Questions  1  to  3  are  based  on  the following  reading
passage.

       One advantage of breeding African bees with other  
       bee types (Africanization) may be resistance to the para-
       sitic mite Varroa jacobsoni, a major threat to modern  
       beekeeping. In parts of Europe, this mite is devastating  
5    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  
10    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  
15    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.  


For  the  following  question,  consider  each  of  the
choices separately and select all that apply  

1. The author cites all of the following as evidence that  
Africanized bees' resistance to Varroa jacobsoni is  
superior to that of European bees:
□A  Varroa jacobsoni is killing many bee colonies in  
Europe.
□B  Beekeepers in Brazil have not used preventive  
measures to protect their colonies.
□C  At least some European bee colonies have been  
saved by preventive measures.

2. Select the sentence that indicates one possible reason  
the  Africanized  bees  in  Brazil  have  successfully
resisted Varroa jacobsoni .  

3. 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 characteris-
tics of European bees.
○E  Bee colonies in Europe continue to produce  
greater quantities of honey than do those in  
Brazil.

普渡哥

正确答案：

1. AB 2. Some researchers point out that...  3. A

大家继续加油！！

韩洋

1.A 2.some scientists…… 3.A

竹林中人

1AB，2.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.
3.A

普渡哥

大家快做吧！