The main iron storage organs are（）
A. Bone marrow
B. Liver
C. Pancreas
D. Spleen
E. Heart
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Non-starch polysaccharides（NSP）are mainly composed of（）and so on
A. Cellulose
B. Hemicellulose
C. Pectin
D. Resistant starch
E. Lignin
The ways animals lose water include（）
A. Excretion of feces
B. Perspiration
C. Respiration
D. Excretion through the product
Excretion of urine
The physiological functions of water include（）
A. Forms the body
B. As a solvent
C. Maintains osmotic pressure
D. Body temperature regulation
E. Lubrication
Apparent metabolizable energy（AME）is the remaining energy after subtracting（）from the gross energy
A. Fecal energy
B. Urine energy
C. Metabolizable fecal energy
D. Gas energy
Endogenous urine energy
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