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