浓缩系统正常运行时，随着系统绝压的降低，浓磷酸沸点相应（）
A、升高
B、降低
C、不变
参考答案：B
Puts into overall Change control include all of the following EXCEPT______.
A．project management plan
B．change requests
C．change control meetings
D．work performance information
腹胀满，无压痛，叩之作空声，可见于
A．水臌
B．气胀
C．痰饮
D．积聚
E．内痈
