The vowel ( ) is a low back vowel. A./i：/ B./u/ C./a：/ D./e/
The vowel ( ) is a low back vowel.
A./i：/
B./u/
C./a：/
D./e/
B./u/
C./a：/
D./e/
参考解析
解析：考查语音学。/a：/是低元音，后元音和紧音。
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