试题题干
Design features refer to the defining properties of human language that distinguish it from any （）system of communication.
参考答案
正确答案：
试题解析
语言的本质特征指的是人类语言的定义性质，区别于任何动物的交流系统。
Design features refer to the defining properties of human language that distinguish it from any （）system of communication.
语言的本质特征指的是人类语言的定义性质，区别于任何动物的交流系统。