[讨论]GWD25-13，答案好像不对

bigtone

    

Grassland songbirds often nest in

    

the same grassland-wetland complexes

    

as waterfowl, particularly in a certain

    

Line part of those complexes,
namely,

    

 (5) upland habitats surrounding wetlands.

    

Although
some wildlife management

    

procedures
directed at waterfowl, such

    

as
habitat enhancement or restoration,

    

may
also benefit songbirds, the impact

    

(10) of others, especially
the control of

    

waterfowl
predators, remains difficult to

    

predict.
For example, most predators

    

of
waterfowl nests prey opportunistic-

    

ally
on songbird nests, and removing

    

(15) these predators could
directly increase

    

songbird
nesting success. Alterna-

    

tively,
small mammals such as mice

    

and
ground squirrels are important

    

in
the diet of many waterfowl-nest

    

(20) predators and can
themselves be

    

important
predators of songbird

    

nets.
Thus. Removing waterfowl-nest

    

predators
could affect songbird nesting

    

success
through subsequent increases

    

(25) in small-mammal
populations.

    

In 1995 and 1996, researchers

    

trapped
and removed certain waterfowl-

    

nest
predators, primary raccoons and

    

striped
skunks, then observed subse-

    

(30) quent survival rates for
songbird nests.

    

Surprisingly,
they observed no sig-

    

nificant
effect on songbird nesting

    

success.
This may be due to several

    

factors.
Neither raccoons nor striped

    

(35) skunks consume ground
squirrels,

    

which
are important predators of song-

    

bird
nests. Thus, their removal may

    

not
have led to significant increases

    

in
populations of smaller predators.

    

(40) Additionally, both
raccoons and striped

    

skunks
prefer wetlands and spend little

    

time
in upland habitats; removing these

    

species
may not have increased the

    

nesting
success of songbirds in the

    

uplands
enough to allow detection.

    

 

    

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Q
13:

    

NOTE:
You must scroll to read the answer

    

choices
for this question.

    

 

    

According
to the passage, which of the

    

following
is true about the role played

    

by
ground squirrels in the ecology of

    

grassland-wetland
complexes?

    

 

    

A.    
While not
important in the diet of

    

raccoons or striped skunks, ground

    

squirrels are a significant source

    

of food for other waterfowl-nest

    

predators.

    

B.    
Whereas ground
squirrels are

    

typically important as predators of

    

songbird nests, their opportunistic

    

predation on waterfowl nests also

    

has an observable effect on water-

    

fowl nesting success.

    

C.    
Although most
waterfowl-nest

    

predators prey on small mammals

    

such as mice and ground squirrels,

    

populations of ground squirrels tend

    

to increase quickly enough to com-

    

pensate for this level of predation.

    

D.    
Although ground
squirrels have been

    

known to prey on songbird nests, a

    

larger portion of their diets is usually

    

provided by predation on waterfowl

    

nests.

    

E.     
Since larger
predators tend to prefer

    

small mammals to songbird eggs as

    

a food source, a large population of

    

ground squirrels plays an important

    

role in controlling opportunistic

    

predation on songbird nests.

答案A，我认为E更好。A项说ground squirrels 不是raccoons or striped skunks的主要食物是对的，但是第二句说它是other waterfowl-nest predators的主要食物就有问题了，因为文中19行只是说squirrels are important in the diet of many waterfowl-nest predators，并不是所有，所以我觉得A这样说，不是不好，而是错误。

E，虽然文中没有直接说prefer的问题，但是通过13行的predators 对songbirds-net 的opportunistically态度，和上边提到的作为predator重要食物来源的说法，可以推出prefer。

这个月就考了，大家帮忙看看。

camilla2006

E肯定不对。文中根本没提到songbird eggs，无关。后一句也无关。无关论据不做无关推理。A中说是“其他”的，没错。

kikhorse

請問A後面為什麼對? 文章沒講到松鼠是other predators的主要食物吧!這不是過度推論嗎?

MaccMichAA

偶只能用POE来解决问题了 真花时间...

yl1004

e.line 12 -line 13，line17-19很清楚地说明了e是正确的

sabrina07

支持E， larger predators袭击songbird nests其实就是要吃eggs。

 small mammals such as mice

and ground squirrels are important

in the diet of many waterfowl-nest

(20) predators and can themselves be

important predators of songbird

nets. Thus. Removing waterfowl-nest

predators could affect songbird nesting

success through subsequent increases

(25) in small-mammal populations.

[此贴子已经被作者于2007-1-11 16:41:33编辑过]

小蓓

这次看明白了，答案A正确。

E有问题，因为文中34行说：Neither raccoons nor striped skunks consume ground squirrels

yahnbin

Q
14:

Which of the following best describes

the function of the sentence 「Neither

raccoons…songbird nests」 (lines 34-37)

in the context of the passage as a whole?

A.     It raises questions about the validity of a

theory described in the first paragraph.

B.     It points out an oversimplification that is

inherent in the argument presented in

the first paragraph.

C.     It introduces information that may help

explain the results of the experiment

that are presented earlier in the

paragraph.

D.     It provides a specific example of the

type of data collected in the experiment

described earlier in the paragraph.

E.      It anticipates a potential objection to the

conclusions drawn by the researchers

involved in the experiment described

earlier in the paragraph.

        


請問  這題答案是A嗎？

qianrene

应该选E吧

E答案中的a large population of

ground squirrels plays an important

role in controlling opportunistic

predation on songbird nests.把

原文说waterfowl-nest

predators主要是吃松鼠，偶尔吃鸟巢。

第一段主要说控制waterfowl-nest

predators也不好，控制松鼠也不好。

A答案没有说对最后对ECOLOGY即鸟蛋的危害

predators也不好，控制松鼠也不好。

A答案没有说对最后对ECOLOGY即鸟蛋的危害

predators主要是吃松鼠，偶尔吃鸟巢。

第一段主要说控制waterfowl-nest

predators也不好，控制松鼠也不好。

A答案没有说对最后对ECOLOGY即鸟蛋的危害

predators也不好，控制松鼠也不好。

A答案没有说对最后对ECOLOGY即鸟蛋的危害