单项选择题
A.吸气性呼吸困难 B.呼气性呼吸困难 C.混合性呼吸困难 D.潮式呼吸 E.简短呼吸
A.150ml,<20cm B.600ml;<40cm C.500ml,<30cm D.800ml,<30cm E.1000ml,<20cm
A.5~7cm,10~15min B.7~10cm,30min C.7~10cm,10~15min D.5~7cm,30min E.15~20cm,30min