对于肺不张严重期的患者，可选择的通气模式是（）
A.SIMV
B.IPPV
C.CPAP
D.IPPV+PEEP
E.PSV
参考答案：C, D
It shocked Lucy’s parents ________ she were not given timely treatment, she would suffer from a cough for the rest of her life.
A．that
B．if
C．that if
D．if that
快件的重量与规格有什么要求？
