What are the properties of language?

What are the properties of language?
【正确答案】：Language is systematic, which means that it is rule governed.
Language is arbitrary.
Language is symbolic.
Language is vocal.
Language is uniquely human.
Language is used for communication.
Language is used to understand and describe the world.
Language is the carrier and container of cultural information.
【题目解析】：参见教材P2-6.
掌握“Properties of language”知识点。