初级汉语教材练习题中词汇的复现与扩展问题研究--以《新实用汉语课本1》为例
초급한어교재연습제중사회적복현여확전문제연구--이《신실용한어과본1》위례
A study on lexical repetition and extension in exercises of the Chinese textbooks for beginners:A study of New Practical Chinese Reader 1