单选题英语tooth→teeth采用的语法手段是（）。A加词尾B加词缀C变换重音的位置D词根内部音素的变化
单选题
英语tooth→teeth采用的语法手段是（）。
A
加词尾
B
加词缀
C
变换重音的位置
D
词根内部音素的变化
参考解析
解析：
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