What are the correct options for describing the oxygen and heat prices of food?
A.
Food oxygen calorific value is divided into biological calorific value and physical calorific value.
B.
The oxygen heat value of protein changes with the change of oxygen consumption .
C.
It refers to the heat produced by consuming 1 liter of oxygen when food is oxidized .
D.
It refers to the energy released when one gram of food is oxidized .