2. 外语
  3. If a single movement from one element to a second element of the tongue is involved, the combing vowels are called

If a single movement from one element to a second element of the tongue is involved, the combing vowels are called

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问题 If a single movement from one element to a second element of the tongue is involved, the combing vowels are called
选项 A、monophthongs.
B、triphthongs.
C、cardinal vowel.
D、diphthongs.
答案D
解析 如果在发音时通过舌头的一次运动，由第一个单元音滑向第二个单元音，所产生的音的组合就叫做双元音。[A]单元音，指在数量上和性质上都恒定不变的纯元音；[B]三元音，发音时通过舌头的两次运动，由第一个单元音滑向第二个单元音，再由第二个单元音滑向第三个单元音；[C]基本元音，指一系列约定俗成的、固定不变的元音特质。
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