为什么假设的题目的答案都是否定句？

做了30个假设的题目，答案都是否定，那个同学能解释一下吗？我没有想通。比如：

GWD5-Q3: (C)

The average hourly wage of television assemblers in Vernland has long been significantly lower than that in neighboring Borodia.  Since Borodia dropped all tariffs on Vernlandian televisions three years ago, the number of televisions sold annually in Borodia has not changed.  However, recent statistics show a drop in the number of television assemblers in Borodia.  Therefore, updated trade statistics will probably indicate that the number of televisions Borodia imports annually from Vernland has increased.

Which of the following is an assumption on which the argument depends?

1. Televisions assembled in Vernland have features that televisions assembled in Borodia do not have.

2. The average number of hours it takes a Borodian television assembler to assemble a television has not
                   decreased significantly during the past three years.

3. The number of televisions assembled annually in Vernland has increased significantly during the past three years.

4. The difference between the hourly wage of television assemblers in Vernland and the hourly wage of television assemblers in Borodia is likely to decrease in the next few years.

GWD5-Q21: (A)

In Teruvia, the quantity of rice produced per year is currently just large enough to satisfy domestic demand.  Teruvia’s total rice acreage will not be expanded in the foreseeable future, nor will rice yields per acre increase appreciably.  Teruvia’s population, however, will be increasing significantly for years to come.  Clearly, therefore, Teruvia will soon have to begin importing rice.

Which of the following is an assumption on which the argument depends?

1. No pronounced trend of decreasing per capita demand for rice is imminent in Teruvia.

2. Not all of the acreage in Teruvia currently planted with rice is well suited to the cultivation of rice.

3. None of the strains of rice grown in Teruvia are exceptionally high-yielding.

4. There are no populated regions in Teruvia in which the population will not increase.。

5. There are no major crops other than rice for which domestic production and domestic demand are currently in balance in Teruvia.

GWD6-Q4: (A)

In the past the country of Siduria has relied heavily on imported oil.  Siduria recently implemented a program to convert heating systems from oil to natural gas.  Siduria already produces more natural gas each year than it burns, and oil production in Sidurian oil fields is increasing at a steady pace.  If these trends in fuel production and usage continue, therefore, Sidurian reliance on foreign sources for fuel should decline soon.

Which of the following is an assumption on which the argument depends?

1. In Siduria the rate of fuel consumption is rising no more quickly than the rate of fuel production.

2. Domestic production of natural gas is rising faster than is domestic production of oil in Siduria.
3. No fuel other than natural gas is expected to be used as a replacement for oil in Siduria.
4. Buildings cannot be heated by solar energy rather than by oil or natural gas.

5. All new homes that are being built will have natural-gas-burning heating systems.

假设题有两种

1）架桥型， 就是从A到B之间给出更能加强B的。如：有一道管理层作决定的那个

Trditionally, decision-making by managers that is reasoned step-by-step has been considered preferable to intuitive decision-making. However, a recent study found that top managers used intuition significantly more than did most middle or lower-level managers. Ths confirms the alternative view that intuition is actually more effective than careful, methodical reasoning.

The conclusion above is based on which of the folloing assumptions?

a) Methodical, step-by-step reasoning is inappropriate for making many real-life management decisions.

b) Top managers have the ability to use either intuitive reasoning or methodical, step-by-step reasoning in making decisions.

c) the decisions made by middle-and lower level managers can be mde as easily by using methodical reasoning as by using intuitive reasoning.

d) top managers use intuitive reasoning in making the majority of their decisions.

e) top managers are more effective at decision-making than middle-or lower level managers.

2）对选项取非。这些题属于除了A没有别的因素影响B，所以用取非来削弱。上面你举的例子都是这些对选项取非的题型。

我的理解是：

- 如果选项有否定词，看其取非是否能够削弱B；

- 如果没有，就用架桥型。可以发现，1）中的选项里面是没有否定词的。

不知道是不是所有的题都可以这样做，至少到现在我碰到的题都是这样的。

现在明白了，看来牛人的总结真是不一样啊！