典型急性肺水肿X线征象
A．是肺纹理模糊
B． 出现间隔线
C．胸膜腔少量积液
D．肺门旁“蝶翼状”影
E．“含气支气管征”
参考答案：D
The boy slipped out of the room and headed for the swimming pool without his parents' _____.
A．command
B．conviction
C．consent
D．compromise
低温储存食品可起到杀灭微生物的作用。( )
