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Language is a system of a()vocal symbols used for human communication.
答案:
arbitrary
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D()is one of the design features of human language which refers to the phenomenon that language consists of two levels: a lower level of meaningless individual sounds and a higher level of meaningful units.
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Duality
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Langue refers to the a()linguistic system shared by all the members of a speech community while the parole is the concrete use of the conventions and application of the rules.
答案:
abstract
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