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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。 It is one of nature s great ironies that the availability of nitrogen in the soil frequently sets an upper limit on plant growth even though the plants leaves are bathed in a sea of nitrogen gas. The leguminous plants among 5 them crop plants such as soybeans, peas, alfalfa, and clover have solved the nitrogen supply problem by entering into a symbiotic relationship with the bacterial genus Rhizobium. 10. Which of the following situations is most closely analogous to the situation described by the author as one of nature s great ironies? That of a farmer whose crops have failed because the normal midseason rains did not materialize and no preparations for irrigation had been made That of a long-distance runner who loses a marathon race because of a wrong turn that cost him twenty seconds That of shipwrecked sailors at sea in a lifeboat, with one flask of drinking water to share among them That of a motorist who runs out of gas a mere five miles from the nearest gas station | 
