The following are the features of Longman Dictionary of Contempo

The following are the features of Longman Dictionary of Contemporary English New Edition （1987） EXCEPT ______.
A、Usage notes
B、language notes
C、extra column
D、clear grammar codes
【正确答案】：C
【题目解析】：根据课本第196到197页，这四个选项中只有C不是这本词典的特征。