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2. For the past 13 years, high school guidance counselors nationwide have implemented an aggressive program to convince high school students to select careers requiring college degrees. The government reported that the percentage of last year’s high school graduates who went on to college was 15 percent greater than the percentage of those who graduated 10 years ago and did so. The counselors concluded from this report that the program had been successful.
The guidance counselors’ reasoning depends on which one of the following assumptions about high school graduates?
(A) The number of graduates who went on to college remained constant each year during the 10-year period.
(B) Any college courses that the graduates take will improve their career prospects.
(C) Some of the graduates who went on to college never received guidance from a high school counselor.
(D) There has been a decrease in the number of graduates who go on to college without career plans.
(E) Many of last year’s graduates who went on to college did so in order to prepare for careers requiring college degrees.
此题以前的讨论请见dispbbs.asp?boardID=24&ID=3947&page=54
我原来选的是D,There has been a decrease in the number of graduates who go on to college without career plans.
这难道不是一个非他因的假设吗？
20. A new gardening rake with an S-shaped handle reduces compression stress on the spine during the pull stroke to about one-fifth of what it is with a straight-handled rake. During the push stroke, however, compression stress is five times more with the new rake than with a straight-handled rake. Neither the push stroke nor the pull stroke with a straight-handled rake produces enough compression stress to cause injury, but compression stress during the push stroke with the new rake is above the danger level. Therefore, straight-handled rakes are better than the new rakes for minimizing risk of spinal injury.
The conclusion above is properly drawn from the permission given if which one of the following is true?
(A) Compression stress resulting from pushing is the only cause of injuries to the spine that occurs as a result of raking.
(B) Raking is a frequent cause of spinal injury among gardeners.
(C) The redesign of a tool rarely results in a net gain of efficiency, since gains tend to be counterbalanced by losses.
(D) A garden rake can never be used in such a way that all the strokes with that rake are push strokes.
(E) It is not possible to design a garden rake with a handle that is other than straight or S-shaped.
A选项中用了only, 所以我没细看就把它给排除了，这也太绝对了呀，正是错误选项的标志，为什么这会不灵了呢
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发表于 2004-7-15 15:00:00
