The underlined word" burnout" (Para. 5) here refers to the state of______.
A.being seriously burnt in the skin.
B.being unable to burn for lack of fuel
C.being badly damaged by fire
D.being unable to function because of excessive use
第9题
A.支气管肺炎
B.急性支气管炎
C.肺结核
D.支气管异物
E.急性喉炎
犬吠样咳嗽,声嘶、喉鸣
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