河南成教 / 英语词汇学
正确率：100%
[单选题] Usage notes of the dictionary explain ______. ( )
A.the slight difference between words of similar meanings
B.difficult points of grammar and style
C.important British and American differences
D.all the above
A.the slight difference between words of similar meanings
B.difficult points of grammar and style
C.important British and American differences
D.all the above
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