单项选择题
支气管树的终末部分为()。
A.肺泡
B.呼吸性细支气管
C.肺泡囊
D.细支气管
E.肺泡管
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单项选择题
She has been working so hard that she feels quite .
A.annoyed
B.bored
C.exhausted
D.interested
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单项选择题
The rise in unemployment the government’s plans for economic recovery.
A.converted
B.frustrated
C.collapsed
D.dismayed
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