Which of the following sets of phonetic feature characterize the English phoneme/?:/?_做题室

单项选择题 Which of the following sets of phonetic feature characterize the English phoneme/?:/?: A、[+semi-closed,+back,-rounded]; B、[+semi-open,+back,+rounded]; C、[+closed,+back,+rounded]; D、[+open,+front,+rounded]

正确答案：B
答案解析：
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