天山逻辑

T-4-Q28

In Berinia, the age at which people could begin to drink alcohol legally used to be 18. In 1990, in an attempt to reduce alcohol consumption and thereby to reduce alcohol-related traffic deaths among Berinians under 21, the legal drinking age was raised to 21. Alcohol-related traffic deaths among people under 21 have decreased significantly since 1990. Nevertheless, surveys show that people in that age-group drink just as much alcohol as they did before 1990.

Which of the following, if true of Berinia, most help to resolve the apparent discrepancy?

A.      For the population as a whole, annual alcohol consumption is no lower now than it was in 1990

B.       Alcohol consumption away from home, for example in bars and restaurants, is much lower among people under 21 than it was in 1990

C.      The proportion of people under 21 who own a car is higher now than it was in 1990

D.      Alcohol consumption is lower among people under 21 than among adults in most other age-groups.

E.       Alcohol-related traffic deaths among people over 21 have increased slightly since 1990.

答案是D，但是我觉得C更清楚，因为21岁的人开车多了，容易出车祸，提高喝酒年龄，车祸率就降了阿

T-4-Q32

Delta products, Inc., has recently switched at least partly from older technologies using fossil fuels to new technologies powered by electricity. The question has been raised whether it can be concluded that for a given level of output, Delta’s operation now causes less fossil fuel to be consumed than it did formerly. The answer, clearly, is yes, since the amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount needed to power the older technologies, provided that the level of output is held constant.

In the argument given, the two boldface portions play which of the following roles?

A.      The first identifies the context of the conclusion of the argument; the second provides support for that conclusion.

B.       The first provides support for the conclusion of the argument; the second identifies the content of that conclusion.

C.      The first states the position that the argument opposes; the second states the conclusion of the argument.

D.      Each provides evidence that calls the conclusion of the argument into question.

E.       Each provides support for conclusion of the argument.

答案选E，第一黑体觉得是为conclusion提供ground阿，A为什么不对啊？

T-4-Q34

In Kravonia, the average salary for jobs requiring a college degree has always been higher than the average salary for jobs that do not require a degree. Current enrollments in Kravonia’s colleges indicate that over the next four years the percentage of the Kravonian workforce with college degree will increase dramatically. Therefore, the average salary for all workers in Kravonia is likely to increase over the next four years.

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

A.      Kravonians with more than one college degree earn more, on average, than do Kravonians with only one college degree.

B.       The percentage of Kravonians who attend college in order to earn higher salaries is higher now than it was several years ago.

C.      The higher average salary for jobs requiring a college degree is not due largely to a scarcity among the Kravonian workforce of people with a college degree.

D.      The average salary in Kravonia for jobs that do not require a college degree will not increase over the next four years.

E        Few members of the Kravonian workforce earned their degrees in other countries.

答案选A，更看不懂了，我觉得C更好

请NN解释下，your comments are much appreciated!