gwd-5-33

liyuan

Q33:

Wolves generally avoid human settlements.  For this reason, domestic sheep, though essentially easy prey for wolves, are not usually attacked by them.  In Hylantia prior to 1910, farmers nevertheless lost considerable numbers of sheep to wolves each year.  Attributing this to the large number for wolves, in 1910 the government began offering rewards to hunters for killing wolves.  From 1910 to 1915, large numbers of wolves were killed.  Yet wolf attacks on sheep increased significantly.

Which of the following, if true, most helps to explain the increase in wolf attacks on sheep?

1. Populations of deer and other wild animals that wolves typically prey on increased significantly in numbers from 1910 to 1915.


2. Prior to 1910, there were no legal restrictions in Hylantia on the hunting of wolves.


3. After 1910 hunters shot and wounded a substantial number of wolves, thereby greatly diminishing these wolves’ ability to prey on wild animals.


4. Domestic sheep are significantly less able than most wild animals to defend themselves against wolf attacks.


5. The systematic hunting of wolves encouraged by the program drove many wolves in Hylantia to migrate to remote mountain areas uninhabited by humans.

答案是C，为什么呢？

horsefish

狼都受伤了, 无法进攻野兽, 只好继续吃家畜-羊. (谁让羊容易吃到了的.)

lawyer_1

问题要你解释的是1910到1915，很多狼被杀，但是对羊的攻击却明显增加。这是一种看起来奇怪的现象，和原来政府实施这措施的初衷不同。要你解释为何会发生这种情况，为何政府的措施引起相反的后果。其他选项易排除，因解释不了这种“但是”。CD易混。D错在没描述政府采取措施后狼的变化，也没描述羊的变化，都没变，则解释不了狼为何在政府采取政策后变得对羊的攻击却明显增加。原文要你解释的是政府采取措施后的这种奇怪现象。C说得是政府采取的措施让狼没法吃野生动物，所以只能攻击较易攻击的家养的羊。注意，解释题不需要充分，只要说出充分解释的主要信息即可。

liyuan

谢谢大家！

为什么我看了半天都没注意到wild呢，唉．．．

ethyl

A：按照这种解释，狼对羊的攻击应该减少

B：Prior to 1910……无关

C：1910年后，受伤的狼多了，而且捕食野生动物的能力受挫

D：没能解释为什么1910-1915年的异常

E：按照这种解释，狼远离居住区，应该不再攻击羊啊

c_violet2000

为什么选Ａ不行？不能说是因为羊先增加－－＞羊的被袭击数量增多吗？

happyfish0517

A.Populations of deer and other wild animals that wolves typically prey on increased significantly in numbers from 1910 to 1915.

我一开始选A，是因为没看到C的WILD,还想C不是越解释越矛盾了啊，狼捕食能力下降，怎么会攻击羊的次数增多呢...其他的实在没好的，就想A说狼的其他捕食对象数量增加，正好说明这时期狼都去吃羊了，没吃其他鹿什么...

反果为因，倒过来推了...

另外这句，Wolves generally avoid human settlements.  For this reason, domestic sheep, though essentially easy prey for wolves, are not usually attacked by them.我不大明白，是因为有狼在，人类就不大定居下来，所以驯养的羊（只有在人类定居处才有？？）虽然很容易被狼捕食，实际上不大被狼攻击？？

感觉这句话的因果好别扭...有人愿意解释一下吗？谢谢！

nasa_mst

*****quote***

另外这句，Wolves generally avoid human settlements.  For this reason, domestic sheep, though essentially easy prey for wolves, are not usually attacked by them.我不大明白，是因为有狼在，人类就不大定居下来，所以驯养的羊（只有在人类定居处才有？？）虽然很容易被狼捕食，实际上不大被狼攻击？？

****unquote****

就是说：狼通常会避开人的居住地，所以虽然家养的羊是狼容易捕获的猎物，但通常不被狼攻击的到。

wayne8888

D很有迷惑性。

但是没有体现出政府措施实施后产生的变化，也就是说政府颁布法令对D提出的内容没有影响，因为羊在法令颁布前一样无法抵挡狼的攻击。另外，在法令颁布前后，虽然WILD ANIMAL有一定的防御能力，狼一样还是可以攻击的。

这样理解可以吗？

earlybirdcyu

同意，D属于INDENTICAL CHOICE，政府实施政策前后没变，所以也就没有影响。