新GRE阅读理解36套每日讨论--74（qq群178674184）

普渡哥 · 发表于 2011-12-20 08:44:36

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 · 发表于 2011-12-20 21:35:08

大家快做吧！

竹林中人 · 发表于 2011-12-21 14:03:15

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

韩洋 · 发表于 2011-12-21 23:20:28

1.A 2.some scientists…… 3.A

普渡哥 · 发表于 2011-12-22 09:45:14

正确答案：

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

大家继续加油！！

[语文] 新GRE阅读理解36套每日讨论--74（qq群178674184）

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