The correct descriptions about the transporation of gas in the blood include
A、both O2 and CO2 are transported in two forms, physical dissolution and chemical combination.
B、The process of ombination of hemoglobin and CO2 into carbaminohemoglobin is enzyme independent.
C、the major component of CO2 transported in the blood is HCO3-
D、the major component of gas transported in the blood is in the form of chemical combination.
E、the properties of chemical combination between O2 and Hb include rapid, reversible and enzyme dependent.