A．位于此六边形所在平面内过A点且垂直于AD的轴
B．垂直于此六边形所在平面且通过O点的轴
C．AD轴
D．垂直于此六边形所在平面且通过A点的轴

A.阑尾炎
B.胰腺炎
C.胆囊炎
D.溃疡穿孔

A．Enthalpy is a state function and an intensity property
B．Enthalpy is a physical quantity so as to study the problems
C．Enthalpy can be thought as the heat value in the system
D．When the closed system does no other work, △rH = Qp