Some words in the basic word stock are said to be stable because they _____. [ ]
A、are complex words
B、are technical words
C、refer to the commonest things in life
D、denote the most important concepts
【正确答案】：C
【题目解析】：基本词汇库中的一些词被认为是稳定的，因为它们指的是生活中最常见的事物。
