大全-12-10，大全-12-19

dandan74

10. The geese that gather at the pond of a large corporation create a hazard for executives who use the corporate helicopter, whose landing site is 40 feet away from the pond. To solve the problem, the corporation plans to import a large number of herding dogs to keep the geese away from the helicopter.
Which of the following, if a realistic possibility, would cast the most serious doubt on the prospects for success of the corporation’s plan?
(A) The dogs will form an uncontrollable pack.
(B) The dogs will require training to learn to herd the geese.
(C) The dogs will frighten away foxes that prey on old and sick geese.
(D) It will be necessary to keep the dogs in quarantine for 30 days after importing them.
(E) Some of the geese will move to the pond of another corporation in order to avoid being herded by the dogs.
为什莫答案是A呢？我选了C，C觉得很勉强，但A觉得也很勉强，各位都是如何选的？

19. Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose, instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the Earth. As is well known, the volume of these hydrocarbons exceeds that of buried organisms. Therefore, our oil reserves would be greater than most geologists believe.
Which of the following, if true, gives the strongest support to the argument above about our oil reserves?
(A) Most geologists think optimistically about the Earth’s reserves of oil.
(B) Most geologists have performed accurate chemical analyses on previously discovered oil reserves.
(C) Ancient seas are buried within the Earth at many places where fossils are abundant.
(D) The only bacteria yet found in oil reserves could have leaked down drill holes from surface contaminants.
(E) Chemical transformations reduce the volume of buried hydrocarbons derived from organisms by roughly the same proportion as bacterial action reduces the volume of other complex hydrocarbons.
这道题不是很理解，答案为E，思路是什莫？

秋水长天

我来试一下还请各位斑竹和大侠批评和指正!秋水有礼先!多谢!)

10、
The geese that gather at the pond of a large corporation create a hazard for executives who use the corporate helicopter, whose landing site is 40 feet away from the pond
这是原文的一个背景！其实也就解释了产生问题的原因！

the corporation plans to import a large number of herding dogs to keep the geese away from the helicopter
这是公司所要采取的措施，也可以说是前提A！

To solve the problem
这一部分当然是结论，也就是所要达到的目的B！

推导方向：A推出B！

这边有个hidden assumption：
The dogs can keep the geese away from the helicopter!
也是本文的一个桥梁！

选项A说明了：The dogs will form an uncontrollable pack.
这群wild dogs不听指挥（注意，有一个uncontrollable），他们要求获得freedom，自然也就没有办法按照公司原来的目的去keep the geese away from the helicopter

为断桥型的weaken！
所以答案为A

19、
Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose, instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the Earth. As is well known, the volume of these hydrocarbons exceeds that of buried organisms.
这是一个fact，也就是前提A！

Therefore, our oil reserves would be greater than most geologists believe
这一部分是结论B！

推导方向是：A推出B！

这边有一个转换关系！
the volume of these hydrocarbons exceeds that of buried organisms

这是一个fact！
而题目已经告诉我们：
只有通过：chemical transformations和bacterial action
其实这两者的作用都是一样的！
才能够转换成oil！

这里就当然有一个转换比率的问题！
选项E其实就说明了这个转换比率的问题！
把这个桥梁给架上了，所以support了原文的conclusion！

我觉得 CR中有很多题目都涉及到比率的问题，最主要是能把这rate给看出来！
这样也就容易得多了！

一家之言，还望大家批评和指正！

dandan74

你的分析和精彩呀，多谢了。

nickynicky

以下是引用秋水长天在2003-10-6 17:36:00的发言：
我来试一下还请各位斑竹和大侠批评和指正!秋水有礼先!多谢!)

10、
The geese that gather at the pond of a large corporation create a hazard for executives who use the corporate helicopter, whose landing site is 40 feet away from the pond
这是原文的一个背景！其实也就解释了产生问题的原因！

the corporation plans to import a large number of herding dogs to keep the geese away from the helicopter
这是公司所要采取的措施，也可以说是前提A！

To solve the problem
这一部分当然是结论，也就是所要达到的目的B！

推导方向：A推出B！

这边有个hidden assumption：
The dogs can keep the geese away from the helicopter!
也是本文的一个桥梁！

选项A说明了：The dogs will form an uncontrollable pack.
这群wild dogs不听指挥（注意，有一个uncontrollable），他们要求获得freedom，自然也就没有办法按照公司原来的目的去keep the geese away from the helicopter

为断桥型的weaken！
所以答案为A

19、
Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose, instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the Earth. As is well known, the volume of these hydrocarbons exceeds that of buried organisms.
这是一个fact，也就是前提A！

Therefore, our oil reserves would be greater than most geologists believe
这一部分是结论B！

推导方向是：A推出B！

这边有一个转换关系！
  the volume of these hydrocarbons exceeds that of buried organisms

这是一个fact！
而题目已经告诉我们：
只有通过：chemical transformations和bacterial action
其实这两者的作用都是一样的！
才能够转换成oil！

这里就当然有一个转换比率的问题！
选项E其实就说明了这个转换比率的问题！
把这个桥梁给架上了，所以support了原文的conclusion！

两者的作用相同，和他们的转换比例相同，有什么必然联系嘛？不好意思，我还是想不通。



我觉得 CR中有很多题目都涉及到比率的问题，最主要是能把这rate给看出来！
这样也就容易得多了！

一家之言，还望大家批评和指正！

bemyselfch

以下是引用秋水长天在2003-10-6 17:36:00的发言：
我来试一下还请各位斑竹和大侠批评和指正!秋水有礼先!多谢!)

10、
The geese that gather at the pond of a large corporation create a hazard for executives who use the corporate helicopter, whose landing site is 40 feet away from the pond
这是原文的一个背景！其实也就解释了产生问题的原因！

the corporation plans to import a large number of herding dogs to keep the geese away from the helicopter
这是公司所要采取的措施，也可以说是前提A！

To solve the problem
这一部分当然是结论，也就是所要达到的目的B！

推导方向：A推出B！

这边有个hidden assumption：
The dogs can keep the geese away from the helicopter!
也是本文的一个桥梁！

选项A说明了：The dogs will form an uncontrollable pack.
这群wild dogs不听指挥（注意，有一个uncontrollable），他们要求获得freedom，自然也就没有办法按照公司原来的目的去keep the geese away from the helicopter

为断桥型的weaken！
所以答案为A

19、
Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose, instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the Earth. As is well known, the volume of these hydrocarbons exceeds that of buried organisms.
这是一个fact，也就是前提A！

Therefore, our oil reserves would be greater than most geologists believe
这一部分是结论B！

推导方向是：A推出B！

这边有一个转换关系！
the volume of these hydrocarbons exceeds that of buried organisms

这是一个fact！
而题目已经告诉我们：
只有通过：chemical transformations和bacterial action
其实这两者的作用都是一样的！
才能够转换成oil！

这里就当然有一个转换比率的问题！
选项E其实就说明了这个转换比率的问题！
把这个桥梁给架上了，所以support了原文的conclusion！

我觉得 CR中有很多题目都涉及到比率的问题，最主要是能把这rate给看出来！
这样也就容易得多了！

一家之言，还望大家批评和指正！

感谢前辈的悉心讲解！

scarlett8327

19题我还是不明白。怎么就support了呢？到底是怎么个推导关系呢。。。

zanyingsan

题目中给出，the volume of
these hydrocarbons（these指other complex） exceeds that of buried organisms 以（碳氢化合物的规模超过了被埋有机物的规模）答案E里给出，chemical transformation（化学变化）reduce 来自于 organisms的 the volume of buried hydrocarbons（被埋碳氢化合物）的比例和 bacterial action（细菌活动）reduces the volume of other complex hydrocarbons（其他复杂碳氢化合物）的比例相同，根据题目里面complex hydrocarbons的量超过了buried hydrocarbons的量，所以同样比例下bacterrial action应该超过chemical transformation的量，又因为bacterrial action产生oil，所以oil的量也应该变大。  

zxppx

scarlett8327 发表于 2009-3-22 12:08
19题我还是不明白。怎么就support了呢？到底是怎么个推导关系呢。。。

        Most geologists believe oil results from chemical transformations of hydrocarbons derived from organisms buried under ancient seas. Suppose, instead, that oil actually results from bacterial action on other complex hydrocarbons that are trapped within the Earth. As is well known, the volume of these hydrocarbons exceeds that of buried organisms. Therefore, our oil reserves would be greater than most geologists believe.

Which of the following, if true, gives the strongest support to the argument above about our oil reserves?

(A) Most geologists think optimistically about the Earth’s reserves of oil.

(B) Most geologists have performed accurate chemical analyses on previously discovered oil reserves.

(C) Ancient seas are buried within the Earth at many places where fossils are abundant.

(D) The only bacteria yet found in oil reserves could have leaked down drill holes from surface contaminants.

已经说明这些细菌能够作用于地球内部的碳氢化合物来产生石油（E）

(E) Chemical transformations reduce the volume of buried hydrocarbons derived from organisms by roughly the same proportion as bacterial action reduces the volume of other complex hydrocarbons.

说明两种方式的效率是相同的，那么文中提到buried hydrocarbons的数量少于细菌作用的hydrocarbons的数量，所以后者产生的oil会更多，加强