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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.
数量矛盾。酒后开车死亡数小了，酒消费没变。非导致开车死亡的酒消费增多了。选B没问题。
一开始选C,禁酒令扩大年龄范围，<21酒消费应该减小，但事实没变，为什么呢。因为<21人总数增加，所以酒消费没变。(后想即使这样也没法解释车祸减少。)
仔细想下：C的意思是有车的多了，而不是<21人群多了。
这里想问的是语法：
The proportion of people under 21 who own a car is higher than it was in 1990.
这个proportion是指什么？who的限定是否起了作用？
1.指21岁有车的人在21岁人群中的比例。
2.指21岁有车的人在总人数中的比例。
当时选C就是因为第2种理解。
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发表于 2009-9-7 10:02:00
