编辑点评: GRE阅读考试的材料,非常强调逻辑的关系,所以逻辑要点是大家在解GRE阅读题的时候的关键,本文就为大家例举了这样一篇逻辑短文,供大家参考和练习。
随着GRE阅读考试的难度日益增加,大家需要有针对性地进行练习,本文为大家例举的就是逻辑短文的练习,文末还附有答案,供大家更好地练习。
Question 4 is based on the following reading passage.
According to astronomer S.A. Phinney, kicking a rock hard enough to free it from Earth s gravity would require a meteorite capable of making a crater more than 60 miles across. Moreover, even if Earth rocks were freed by meteorite impact, Mars s orbit is much larger than Earth s, so Phinney estimates that the probability of these rocks hitting Mars is about one-tenth as great as that of Mars s rocks hitting Earth. To demonstrate this estimate, Phinney used a computer to calculate where 1,000 hypothetical particles would go if ejected from Earth in random directions. He found that 17 of the 1,000 particles would hit Mars.
4. Which of the following, if true, would cast most doubt on Phinney s estimate of the probability of Earth rocks hitting Mars?
○A Rather than going in random directions, about 25 percent of all particles ejected from Earth go in the same direction into space.
○B Approximately 100 meteorites large enough to make a noticeable crater hit the Earth each year.
○C No rocks of Earth origin have been detected on Mars.
○D The velocity of rocks escaping from Earth s gravity is lower than the velocity of meteorites hitting the Earth.
○E No craters more than 60 miles across have been found on Mars.
答案:A
上文的题目大家答对了几题?大家不仅要多做题,更要善于总结,这样才会有针对性地提高。
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