Which group of vowels are back vowels?
A. /i://ɪ/
B. /ɔ://ɔ/
C. /ɑ://ʌ/
D. /u:/ /ə/
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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