D. Chronic bronchitis patients purse their lips when they exhale and typically show signs of weight loss.
D. Chronic bronchitis patients purse their lips when they exhale and typically show signs of weight loss.
慢性支气管炎病人噘起嘴唇，当他们呼出气时且会出现体重减轻。
D. Chronic bronchitis patients purse their lips when they exhale and typically show signs of weight loss.
慢性支气管炎病人噘起嘴唇，当他们呼出气时且会出现体重减轻。