【简答题】What are the principles of behaviourism?
【单选题】In The Principles of Language Study (1921), Palmer put forward nine fundamental principles of good language teaching and learning, of which ______ was the first and most important.
A.
reinforcement and response
【判断题】像素是组成位图图像最基本的元素,单位符号为cm。
【单选题】景教又称 ( ) , 是中国对基督教的一个早期派别聂斯脱利派 的称谓。