2道GWD，准考生，谢各位帮助！！

iamdurant

2道GWD，准考生了，求大神指点谢谢
T-3-Q24.
Each year red-winged blackbirds stop in a certain region of Midland Province on their spring and fall migration. In the fall, they eat a significant portion of the province’s sunflower crop. This year Midland farmers sought permits to set out small amounts of poisoned rice during the blackbirds’ spring stop in order to reduce the fall blackbird population. Some residents voiced concern that the rice could threaten certain species of rare migratory birds. Nevertheless, the wildlife agency approved the permits.
Which of the following, if true, most helps to justify the wildlife agency’s approval of the permits, given the concern voiced by some residents?
A. In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.
B. The poison that farmers want to use does not kill birds but rather make them incapable of producing viable eggs.
C. Since rice is not raised in midland province, few species of birds native to the province normally eat rice.
D. Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined
E. The poison that farmers got approval to use has no taste or smell that would make it detectable by birds.这题我选了C，答案是A,求解释谢谢！

T-3-Q40.  
Boreal owls range over a much larger area than do other owls of similar size. The reason for this behavior is that the small mammals on which owls feed are especially scarce in the forests where boreal owls live, and the relative scarcity of prey requires the owls to range more extensively to find sufficient food.
Which of the following ,if true, most helps to confirm the explanation above?
A. Some boreal owls range over an area eight times larger than the area over which any other owl of similar size ranges
B. Boreal owls range over larger areas in regions where food of the sort eaten by small mammals is sparse than they do in regions where such food is abundant.
C. After their young hatch, boreal owls must hunt more often than before in order to feed both themselves and their newly hatched young
D. Sometimes individual boreal owls hunt near a single location for many weeks at a time and do not range rather than a few hundred yards.
E. The boreal owl requires less food, relative to its weight, than is required by members of other owl species.
这题我选的C,答案是B,解析说mammal的食物没了，所以mammal的数量少了，所以以mammal为食的owl也就要range over area了，这其中没有过度推断吗？
小弟选的C,不正强调了owl没有食物就不得不range over area吗？

 快考试了，求高手指点，感激！！！

jianaozhonghua

关键是看清前提和结论，建议看看sdcar2010的帖子，时间很紧了最好也看看收获会很大。


Each year red-winged blackbirds stop in a certain region of Midland Province on their spring and fall migration. In the fall, they eat a significant portion of the province’s sunflower crop. This year Midland farmers sought permits to set out small amounts of poisoned rice during the blackbirds’ spring stop in order to reduce the fall blackbird population. Some residents voiced concern that the rice could threaten certain species of rare migratory birds. Nevertheless, the wildlife agency approved the permits.
Which of the following, if true, most helps to justify the wildlife agency’s approval of the permits, given the concern voiced by some residents?

Situation:
村民要用毒米毒死一部分鸟，而有人怕这回毒死珍贵的red鸟。However，野生动物协会还是同意了。为啥呢？

A.    In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.
这些red鸟是最早出现在田里面填饱肚子的———村民可以等他们吃完了在下毒。不会伤害一只red鸟

B.    The poison that farmers want to use does not kill birds but rather make them incapable of producing viable eggs.
这个方法可能伤害到red鸟的数量

C.    Since rice is not raised in midland province, few species of birds native to the province normally eat rice.
几乎没有鸟来吃，那么农民还这么做干什么呢？属于反前提，前提已经说了弄明这么做是为了减少鸟数量。   也可以想：就算few species吃，万一这仅有的few species里面包括red鸟呢？前功尽弃了

D.    Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined
无关。扯啥呢

E.    The poison that farmers got approval to use has no taste or smell that would make it detectable by birds
好吧，鸟发现不了自己被下毒了，red鸟也发现不了。。


Boreal owls range over a much larger area than do other owls of similar size. The reason for this behavior is that the small mammals on which owls feed are especially scarce in the forests where boreal owls live, and the relative scarcity of prey requires the owls to range more extensively to find sufficient food.

Which of the following ,if true, most helps to confirm the explanation above?

Situation：
B猫头鹰生活范围大是因为捕猎范围大，求证实

A.    Some boreal owls range over an area eight times larger than the area over which any other owl of similar size ranges
陈述事实 没法加强证实

B.    Boreal owls range over larger areas in regions where food of the sort eaten by small mammals is sparse than they do in regions where such food is abundant.
B猫头鹰在mammals不充足的地方捕猎范围大，充足地方捕猎范围小，直接证明了捕猎范围和mammal密度的关系。

C.    After their young hatch, boreal owls must hunt more often than before in order to feed both themselves and their newly hatched young
这是个必然的事实，多了几口子吃饭呢。但是说出来这个有啥用？能强化猫头鹰捕猎范围大是因为范围里面哺乳动物少这个论断么？

D.    Sometimes individual boreal owls hunt near a single location for many weeks at a time and do not range rather than a few hundred yards.
是一种捕猎现象。积聚在一个地方捕猎很久。但是并不能强化猫头鹰捕猎范围大是因为范围里面哺乳动物少这个论断。

E.    The boreal owl requires less food, relative to its weight, than is required by members of other owl species.
一样，说了一个事实。没法证明***论断

iamdurant

非常感谢大哥指点，顿悟！！！！

iamdurant

真的辛苦了！！

jianaozhonghua

没事  大家一起加油~

SallySun

1#解释不对吧....村民是担心毒死其它的比较珍贵的迁徙的鸟类，不是说担心毒死red鸟...就是因为red鸟在每年春天先来，吃完了那些毒米，其它后到的迁徙的鸟才不会被毒死...

418722521

我觉得a也有问题啊，他说的是秋天吃鸟，但是a说的是in the spring 给他们吃药

cicy11

1L的说法根本不对。。。。毒害的就是red鸟。。你的A成了反对协会的看法的了。。。

dsy0506

SallySun 发表于 2011-7-21 21:00
1#解释不对吧....村民是担心毒死其它的比较珍贵的迁徙的鸟类，不是说担心毒死red鸟...就是因为red鸟在每年 ...

同意，题干中要保护的不是red鸟而是另一种稀有的鸟类，选A是说等red鸟吃完了毒死就不会伤害其他鸟类了，但还是觉得A有点不是那么好理解

RichardVeritas

T-3-Q24.
逻辑关联事物：
1. farmers want to use small amount of poisoned rice to reduce the population of red-winged blackbirds.
2. residents concerned about population of certain species of rare migratory birds.

考虑2情况下，为什么1可以？即1不会妨碍到2

不看答案，我在想red-winged blackbirds应该不算certain species of rare migratory birds之内。

看答案：
A. In the region where the red-winged blackbirds stop, they are the first birds to be present in the spring.
逻辑联接可以有很多个方向，这题答案A给的就是一个一般想不到的方向。同意前面分析，small amount of rice, red-winged blackbirds 先来，所以这帮鸟吃完了，就不会伤害到后来的certain species of rare migratory birds。注意答案不需要确保成立，只要帮助解释可能性就可以了。

B. The poison that farmers want to use does not kill birds but rather make them incapable of producing viable eggs.
错。题干没说要毒死。不生还是会影响population, 包括2在内。

C. Since rice is not raised in midland province, few species of birds native to the province normally eat rice.
birds native to the province  和题干问的 certain species of rare migratory birds 不是一回事，无关

D. Without the permit, any farmers shown to have set out poison for the blackbirds would be heavily fined
E. The poison that farmers got approval to use has no taste or smell that would make it detectable by birds.
D.E 明显无关
Richard 770 逻辑答题讨论
https://forum.chasedream.com/forum.php?mod=viewthread&tid=1303467&fromuid=1294035