There is only one way to classify the English pure vowels.
举一反三
- There is only one way to classify volunteers.（ ）
- What criterion is NOT used to classify the English vowels(). A: The openness of the mouth. B: The shape of the lip. C: The length of the vowels. D: The position of the teeth.
- What criteria are used to classify the English vowels
- 中国大学MOOC: Pure vowels can be classified into three categories: front vowels, central vowels and back vowels. The two vowels/ɜː/ and /ə/ are classified into ______ vowels because they are made with the middle part of the tongue being raised.
- 中国大学MOOC: There are two types of vowels. One type is pure vowel and the other is ________.