She worries __________,so she often feels much___________.

A． much too, stressed

B． too much, more stressed

C． too many , less stressed

D． a lot, less stressed

烧伤后ARDS可表现为（）

A.发病早期可无异常表现

B.动脉血气分析PaO₂、PaCO₂下降

C.可出现呼吸性碱中毒

D.呼吸窘迫

E.严重时发展成MODS