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单项选择题

女性腰臀比超过多少可判断为腹部肥胖？

A.0.8
B.0.85
C.0.9

问答题

Vowels  (元音) are sounds in which there is no obstruction to the flow of air as it passes the larynx (喉头) to the lips. There are ____ pure vowels and 8 diphthongs.
 (请在空格中填入阿拉伯数字)