gwd1-12有严重不同看法

jaredyu

注意文中there is no

(70)      reason to suspect that the effect

would be qualitatively different

than what was seen in the

aftermath of the Mount Saint

Helens eruption.

这里正是讲的人为破坏和火山爆发的影响是一样的，什么是一样的呢，文章下一句话就是答案

这一句花怎么也看不懂? 没有理由去怀疑影响有质量上的不同,也就是说两种影响是有质量上的不同. 怎么会是"这里正是讲的人为破坏和火山爆发的影响是一样的，", 哪位NN帮忙解释一下这句话吧,先谢谢了. 还有,这里用than,那么比较级在哪儿呢?

lcy

The author mentions the “aftermath of the Mount Saint Helens eruption” (lines 73-74) most likely in order to



問細節, 該段文字所提才算數, 同意选c

gracezhong78

以下是引用jaredyu在2005-12-10 15:10:00的发言：

注意文中there is no
      

(70)      reason to suspect that the effect
       

would be qualitatively different
       

than what was seen in the
       

aftermath of the Mount Saint
       

Helens eruption.
      

这里正是讲的人为破坏和火山爆发的影响是一样的，什么是一样的呢，文章下一句话就是答案

这一句花怎么也看不懂? 没有理由去怀疑影响有质量上的不同,也就是说两种影响是有质量上的不同. 怎么会是"这里正是讲的人为破坏和火山爆发的影响是一样的，", 哪位NN帮忙解释一下这句话吧,先谢谢了. 还有,这里用than,那么比较级在哪儿呢?

是不是应该这样理解：没有理由怀疑两者之间的影响存在质量上的不同，即怀疑两者之间的影响存在质量上的不同是没有理由的，也就是说两者的影响是一样的。好绕啊！

[此贴子已经被作者于2006-8-11 14:36:56编辑过]

superdino

果然狡猾的RC!!

GWD-1-Q12:

The author mentions the “aftermath of the Mount Saint Helens eruption” (lines 73-74) most likely in order to

 

A.    provide an example of the process that allows the repopulation of rivers whose indigenous salmon population has become extinct

B.    indicate the extent to which the disturbance of salmon habitat by human activity in one stream might affect the genetic structure of salmon populations elsewhere

C.    provide a standard of comparison against which the impact of human activity on the gene flow among salmon populations should be measured

D.    show how salmons’ homing instinct can be impaired as a result of severe environmental degradation of their natal streams

E.    show why straying rates in salmon populations remain generally low except when spawning streams suffer severe environmental disturbance

本题有争议,答案是C,但是很多人觉得B对. I USED TO CHOOSE B TOO!但是现在看看,还是C对!

回文中定位! 最后一段. 没人能够定量人类行为造成鱼儿游离的比率,但是这种影响的性质和火山是一样的.所以B是不对的,EXTENT程度应该属于定量了! 而STANDARD的含义the effectwould be qualitatively different than what was seen in theaftermath of the Mount Saint

Helens eruption.

 Although no one has quantified

changes in the rate of straying

as a result of the disturbances

caused by humans, there is no

 (70)      reason to suspect that the effect

would be qualitatively different

than what was seen in the

aftermath of the Mount Saint

Helens eruption.  Such a dra-

 (75)      matic increase in straying from

damaged areas to more pristine

streams results in substantial

gene flow, which can in turn lower

the overall fitness of subsequent

generations.

iceage_spring

I used to choose B too, but now I think C is a better choice.

Notice the use of the words in the paragraph, 1. "Although no one has quantified..." --> This indicates author's attitude, he/she thinks quantify the changes would be a good idea. 2. "...no reason to suspect that the effect would be qualitatively different than  what was seen in the aftermath of the Mount Saint Helens eruption." The author is hinting that a comparision of the effect of human activity against that of the Mount Saint Helens eruption should be done.

On the other hand, B is a wrong statement: Mount Saint Helens eruption is not the most severe disturbance of salmon inhabitat, at least it doesn't say so in the article. In fact, human activity can be far more severe than Mount Saint Helens eruption in disturbing the salmon inhabitat. The first sentence of the article says: "...large stretches of salmon habitat have been eliminated by human activity..." But B says: "indicate the extent to which the disturbance ...by human activity ... might affect the genetic structure ...", "the extent to which" means author thinks the disturbance caused by Mount Saint Helens eruption is the most severe, and this is simplely not true, and it's not stated in the paragraph at all. So B is not a good choice.

D is wrong too, since salmon's homing instinct never get impaired by the Mount Saint Helens eruption, it's just that the salmons have no other way but to stray to other rivers because their natal streams are full of mud and debris from the eruption. Notice the word "...were forced to find alternative streams..."

Above are only my two cents.

carinayy12

我选Ｃ的　呵呵　because no reason to suspect.....difference 嘛！当然是提供了一个比较拉，正因为没有定量的比较呀才有这个。。。我新来得，才作了第一套，嘿嘿

wu_keming

看前面这道题已经有个10页长的帖子了，想想还是在这里跟吧，看谁还能在和我讨论一下。我比较了一下前面各家的说法，还是倾向于选B，细节部分之前已经讨论了很多，我从整篇文章出发提供另一个角度看看吧。

首先题目的问题是：作者举这个例的目的是什么，注意是目的，而不是说这个例子说明了什么。文章第一段是总述人类行为对三文鱼的影响，第二段提出另一种潜在的影响，即环境变化造成迷路鱼的增加，从而影响三文鱼的基因流向，这时候举出自然界环境变化对鱼的影响，从而推断人类改变环境也会造成类似的影响。

所以可以排除D，因为D是这个例子直接说明的问题，而不是作者举这个例子的目的。

B与C都把主题放在人类上，应该说都有一定的道理，但仔细看用词：
B.    indicate（暗示，意味） the extent to which the disturbance of salmon habitat by human activity in one stream might affect the genetic structure of salmon populations elsewhere
C.    provide a standard of comparison against which the impact of human activity on the gene flow among salmon populations should be measured 

很明显B的用词更“象”正确答案，因为文章一早就说这是一个并未量化只是潜在可能的一种影响，B的说法比较符合原文的意思：用自然界的例子来暗示人类类似行为可能会有类似效果。

而C的用词就有点绝对化：“应该基于这个标准的比较来衡量人类的影响”，我认为这就超出作者的原本目的了。

一点拙见，还望指教

晴天小狗

Q9:

The primary purpose of the passage is to

          

A.     argue against a conventional explanation for the extinction of certain salmon populations and suggest an alternative

B.     correct a common misunderstanding about the behavior of salmon in response to environmental degradation caused by human activity

C.     compare the effects of human activity on salmon populations with the effects of natural disturbances on salmon populations

D.     differentiate the particular effects of various human activities on salmon habitats

E.      describe how environmental degradation can cause changes in salmon populations that extend beyond a numerical reduction

又读了一遍文章，主题都选不出了。请讲讲文章的大概思路吧

windspeaker

以下是引用carinayy12在2006-10-10 22:30:00的发言：

我选Ｃ的　呵呵　because no reason to suspect.....difference 嘛！当然是提供了一个比较拉，正因为没有定量的比较呀才有这个。。。我新来得，才作了第一套，嘿嘿

这是个应试的好办法!!

ptr07

D is correct
C is correct only if the questoin asks the vocano eruption in previous paragraph in order to,