Linguists attempt to discover the universals of human language. ()
第1题
The Rocky Mountains form. the most important river divide in the States, separating the system of the Mexican gulf and the system of the Pacific. ()
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!