最新英语专业考研英语语言学考点测评的圈子（掌阅）

最新英语专业考研英语语言学考点测评书圈

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LV8 2019-03-25

(2) Duality is meant the property of having two levels of structures, such that units of the primary level are composed of elements of the secondary level and each of the two levels has its own principles of organization. (2 point)

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