According to__________ , vowels can be classified into three gro

分类: 现代语言学(00830) 发布时间: 2024-08-30 23:53 浏览量: 1
According to__________ , vowels can be classified into three groups: front, central, and back.
A、the openness of the mouth
B、the shape of the lips
C、the position of the tongue
D、the length of the vowels
【正确答案】:C