试题题干
Fill in each of the following blanks with a word or an expression.
In producing a 
the soft palate is lowered to allow airflow through the nasal tract.
参考答案
试题解析
在发鼻音时，软腭被降低以允许气流通过鼻腔。
Fill in each of the following blanks with a word or an expression.
In producing a the soft palate is lowered to allow airflow through the nasal tract.
在发鼻音时，软腭被降低以允许气流通过鼻腔。