Words of the basic word stock can each be used alone, and at the same time can form new words with other roots and affixes, e.g. foot is the father of football, footage and footprint. This demonstrates that one of the characteristics of the words of the basic stock is ______ . ( )

时间：2021-09-01 23:13 关键词： 联大 信阳师范学院 英语词汇学