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GRE阅读模拟练习题(250)

2017-05-20 09:35:00来源：网络

　　为了帮助大家练习GRE阅读题考点，新东方在线GRE频道为大家带来GRE阅读模拟练习题一文，希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

　　When studying shrimp feeding from hydrothermal vents at the bottom of the ocean, biologists were surprised that the shrimps’ reproductive cycles followed seasonal patterns. Far beyond the reach of sunlight, and with food abundant around the vents all year round, why should such animals reproduce seasonally? The answer might involve their offspring, which in their larval form drift in the currents to colonize new vents. The larvae must feed during their trip, and their springtime release coincides with a peak in algae raining down from surface waters. So far, researchers have found no evidence of seasonal breeding among vent-dwelling species that provide their offspring with yolk to sustain them or among vent-dwelling species found in areas of the ocean with no seasonal algae blooms.

　　1. Which of the following best describes the function of the highlighted sentence?

　　A：It casts doubt on the accuracy of earlier observations of seasonal breeding among shrimp species living near hydrothermal vents.

　　B：It undermines the explanation proposed for seasonal breeding among some shrimp species living near hydrothermal vents.

　　C：It suggests that alternative theories are needed to explain seasonal breeding among shrimp species living near hydrothermal vents.

　　D：It describes the survival benefits to shrimp of mating in parts of the ocean where algae blooms rain down abundantly.

　　E：It supports the explanation proffered for the seasonal breeding observed among some shrimp species living near hydrothermal vents.

　　答案：E

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