单选题 Which of the following property of language enables language users to overcome the barriers caused by time and place, due to this feature of language, speakers of a language are free to talk about anything in any situation?

单选题 Language is a system of arbitrary vocal _____________ used for human communication.

单选题 __________ refers to the actual realization of the ideal language user’s knowledge of the rules of his language in utterances.

单选题 The sentence “Water boils at 100 degrees Centigrade.” shows __________function.

单选题 In Chinese when someone breaks a bowl or a plate the host or the people present are likely to say“碎碎（岁岁）平安”as a means of controlling the forces which they believes feel might affect their lives. Which functions does it perform?

单选题 When a dog is barking, you assume it is barking for something or at someone that exists here and now. It couldn’t be sorrowful for some lost love or lost bone. This indicates the design feature of __________.

单选题 Study the following dialogue. What function does it play according to the functions of language?
— A nice day, isn’t it?
— Right! I really enjoy the sunlight.

单选题 Which of the following words is entirely arbitrary?