企源知识库

Vocabulary is the most （ ）element of a language as it is undergoing constant changes both in form and content.
A、unbalanced
B、unstable
C、unhinged
D、undoubted
【正确答案】：B
【题目解析】：词汇的发展随着时间发展，一个语言它的词汇部分是最容易发生改变的，包括旧词汇的淘汰和新词汇的创造。