게시일 : 2007.05.20

김재응 강사의 배경지식4


알아두면 좋은 배경지식들만 모아서 올려드립니다.
토플시험은 배경지식도 충분히 알고 있어야 합니다.
Cheer up!!!


The Habits of Whales


Although little is known directly of the social behavior! of whales, it is clear that most are gregarious, traveling in schools, also called pods or gams. Occasionally, whales thrust themselves completely out of the water, leaping into the air, and falling back with a huge splash. This breaching is thought to be associated with some aspects of reproduction or courtship, but may be onl　　y incidental to some other behavior! as yet undetermined. Almost all species of cetaceans are known to produce sounds, and these sounds may serve as an import!ant means of interaction and communication. All odontocetes thus far investigated produce short, pulse-type sounds that function in echolocation. In addition, most species are also known to emit high- pitched squeals and whistles that appear to be used as part of social behavior!. Although there is no evidence that these sounds represent anything comparable to a true language, there is little doubt that they are used to denote specific emotional states, for example, fright, hunger, or sexual readiness. Although these baleen whale sounds are probably associated in some way with social behavior! and communication, possible over distances of many kilometers, there are no data available to demonstrate a specific function.



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