Of the three branches of phonetics, the longest established, and until recently the most highly developed, is()phonetics.
- A、auditory
 - B、acoustic
 - C、articulatory
 - D、none of the above three
 
正确答案:C
答案解析:有

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Of the three branches of phonetics, the longest established, and until recently the most highly developed, is()phonetics.

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