试题题干
Fill in each of the following blanks with a word or an expression.
Human languages have such design features as productivity, discreteness, displacement, arbitrariness, cultural transmission, duality and 
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参考答案
试题解析
人类语言具有以下的甄别性特征：能产性，离散性，位移性，任意性，文化传播性，双重性和互换性。