"Diamond cut diamond" is an idiom, which reflects ____

"Diamond cut diamond" is an idiom, which reflects ______.
A、the constituents of idioms can't be replaced
B、the word order can't be inverted
C、the constituents of an idiom can't be deleted
D、many idioms are grammatically unanalysable
【正确答案】：D
【题目解析】：本题考查第九章习语的一个特点结构的稳定性structural stability的相关内容。结构稳定性包括以上四点内容，Diamond cut diamond（棋逢对手）从语法分析来看，cut应该为cuts，故此习语是语法分析不通的，选D项。