【单选题】What can be the best title for the text?
A.
Sign language and spoken language.
C.
Findings about sign language.
D.
The origin of language.
【单选题】●A highlevel language is an artificial language with which we can write various (71) . (71)
【判断题】使用光符号识别方法输入数据的方式是交互式输入方式。()
【判断题】随着真核生物的出现,原始大气才逐渐产生了氧气。()
【单选题】Classroom language can also be called in-class language, which is the specially used language system by both teachers and students in classroom teaching. Which of the following is not consisted in it?
【简答题】世界贸易组织确立的经济体制是() A自由贸易体制 B市场经济体制 C公平竞争机制
【单选题】Which animal can be said to have language if language is defined as a system for exchanging information by new combinations of symbols?