GRE
简答题根据以下内容回答题
water beetles have a number of adaptationsthat make them able to live in water rather than on land as their countlessbeetle cousins do．Their spiracles open and close to take in air when they are on thesurface and keep water out when they Lineare underwater．Whirligig beetles have a clever division in their eyes that allows(5)themto see above and below the surface at the same time．Anumber of Water
beetles，especially those that diveto find prey，trap and carry air bubbles with them ontheir abdomens，much as scuba divers carry air in theiroxygen tanks．
The legs of water beetles differfrom those of their landlubber cousins．0ften then are covered with fringelike hairsthat help them speed across the water’s surface．(10)Like all beetles，water beetles arecapable of flight，but they usually use this skill onlyto escape predators or to move from puddle to pond．
The sentence in the passage that connectsLEAST to the main idea is probably_________
water beetles have a number of adaptationsthat make them able to live in water rather than on land as their countlessbeetle cousins do．Their spiracles open and close to take in air when they are on thesurface and keep water out when they Lineare underwater．Whirligig beetles have a clever division in their eyes that allows(5)themto see above and below the surface at the same time．Anumber of Water
beetles，especially those that diveto find prey，trap and carry air bubbles with them ontheir abdomens，much as scuba divers carry air in theiroxygen tanks．
The legs of water beetles differfrom those of their landlubber cousins．0ften then are covered with fringelike hairsthat help them speed across the water’s surface．(10)Like all beetles，water beetles arecapable of flight，but they usually use this skill onlyto escape predators or to move from puddle to pond．
The sentence in the passage that connectsLEAST to the main idea is probably_________
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E
First find the main idea．The passage as a whole deals with adaptations that allow water beetles to live in water．Choices A，B，C，and D support this main idea，but choice E does not．
First find the main idea．The passage as a whole deals with adaptations that allow water beetles to live in water．Choices A，B，C，and D support this main idea，but choice E does not．
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