中国大学MOOC: Vowels are sounds produced without obstruction, so no turbulence or a total stopping of the air can be perceived.
举一反三
- Which of the following statements is/are correct about vowels? A: Vowels are produced without significant constriction of the air flowing through the mouth. B: There are 28 vowel sounds in English. C: Vowels refer to the sounds in spoken language that are made with no obstruction of air flow in the mouth. D: All vowels are voiced.
- 中国大学MOOC: Vowels are sounds produced by constricting or obstructing the vocal tract at some place to divert, impede or completely shut off the flow of the air in the oral cavity.
- 中国大学MOOC: Consonants differ from vowels in that the formed are articulated without obstruction in the oral cavity.
- 中国大学MOOC: The difference between vowels and consonants lies in the obstruction of the airstream.
- Vowels are sounds in which there is （ ）（ ）to the flow of air as it passes from the （ ） to the lips.