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.
举一反三
- 中国大学MOOC: Vowels are sounds produced without obstruction, so no turbulence or a total stopping of the air can be perceived.
- 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: Consonants differ from vowels in that the formed are articulated without obstruction in the oral cavity.
- Vowels are sounds in which there is （ ）（ ）to the flow of air as it passes from the （ ） to the lips.
- 中国大学MOOC: When the vocal folds are apart, the air can pass through easily and the sound produced is said to be voiced.