题目内容

肺结核原发综合症包括

A. 原发病灶
B. 肺门淋巴结结核
C. 结核性淋巴管炎
D. 结核球
E. 局灶性肺结核

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what's the definition of vowel(s)?

The English pure vowels can be classified according to

A. the position of the lips.
B. the height of the raised part of the tongue.
C. the dgree of obstruction to the flow.
D. the part of the tongue raised.

/i/ is a much more tense sound than /i:/.

A. 对
B. 错

/e/ is a central vowel.

A. 对
B. 错

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