题目内容

Which group of vowels are back vowels?

A. /i://ɪ/
B. /ɔ://ɔ/
C. /ɑ://ʌ/
D. /u:/ /ə/

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更多问题

There are totally ______ phonemesin English.

Phonetic features in English includesegmental phonemes and suprasegmental phonemes.

A. 对
B. 错

/ɪə /, /eə/ and/ʊə/ areclosing diphthongs.

A. 对
B. 错

/p/,/b/, /t/,/d/,/k/and/g/ are called plosives.

A. 对
B. 错

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