新GRE阅读题之逻辑单题精选
引导语：下面小编就和大家分享一些新GRE阅读逻辑单题精选，希望能够帮助到您，谢谢您的阅读。
逻辑单题一
Although the percentage of first graders in Almaria who were excellent readers varied little between 1995 and 2010, the percentage of first graders who had considerable difficulty reading their schoolbooks increased markedly during that period. This evidence strongly indicates that the average reading ability of first graders decreased between 1995 and 2010.
10. Which of the following, if true, provides the strongest additional support for the argument?
A. The number of hours devoted to reading activities in first-grade classrooms in Almaria did not vary significantly, on average, between 1995 and 2010.
B. The percentage of first graders in Almaria who had difficulty solving arithmetic problems did not increase as much between 1995 and 2010 as did the percentage of first graders who had reading difficulties.
C. The number of children in Almaria who were enrolled as first graders decreased steadily between 1995 and 2010.
D. The average difficulty of the schoolbooks used in first-grade classrooms in Almaria decreased between 1995 and 2010.
E. The average number of schoolbooks used in first-grade classrooms in Almaria increased between 1995 and 2010.
答案：D
逻辑单题二
Cotton grass, which grows only in arctic regions, has been the only summertime source of protein available to caribou. Caribou that do not get adequate amounts of protein in the summer are unable to reproduce the following year. Rising average temperatures in arctic regions, however, are causing cotton grass to disappear. Therefore, if the warming trend continues, caribou are likely to become extinct.
9. Which of the following is an assumption on which the argument depends?
A. cotton grass is the only one of the caribou’s food sources that is becoming scarce as temperatures rise in arctic regions.
B. caribou that do not eat enough protein to reproduce do not live as long as caribou that do
C. The warming trend in arctic regions will not enable other plants capable of providing protein to caribou to grow there.
D. The caribou is the only animal that depends on cotton grass as a major source of food.
E. If the warming trend continues and cotton grass disappears from arctic regions, then cotton grass will be extinct.
答案：C
逻辑单题三
In mountainous regions, the timberline is the highest altitude at which trees grow. In the Rocky Mountains, the current timberline is at the altitude above which growing season temperatures remain cooler than 10 degrees centigrade. Fossilized remains of trees that grew 10,000 years ago have been found 100 meters above the current Rocky Mountain timberline. Clearly, therefore, the climate of the Rocky Mountains is cooler now than it was 10,000 years ago.
8. Which of the following is an assumption on which the argument relies?
A. In the past 10,000 years, the only trees to have grown above today's timberline are the trees whose fossilized remains been found.
B. No trees grew 10,000 years ago at altitudes higher than the ones at which fossilized tree remains have been found.
C. The fossils are not of species of trees that were able to tolerate cooler growing temperatures than are the species that currently grow near the timberline.
D. The Rocky Mountains have not eroded significantly over the past 10,000 years.
E. The climate of the Rocky Mountains has never been significantly warmer than during the lifetime of the trees whose fossilized remains have been found.
答案：C
逻辑单题四
Although initially symptomless, glaucoma can eventually cause blindness when not properly treated. Tests under laboratory conditions of the traditional treatment, daily administration of eyedrops, show it to be as effective in relieving the internal ocular pressure that causes glaucoma as is a new laser-surgical procedure. Yet glaucoma-related blindness occurs in a significantly smaller percentage of patients who have had the surgery than of patients for whom only the eyedrop treatment was prescribed.
7. Which of following, if true, most helps to explain the low rate glaucoma-related blindness among patients who had the surgery?
A. Glaucoma-related blindness is no more common among patients who have had only the surgery than it is among patients who had the surgery after using the eyedrops
B. Doctors rarely recommend the surgery for glaucoma patients who have already started the traditional course of treatment
C. There is no known physiological cause of glaucoma other than increase in pressure inside the eye