Problem
20. The most important ACID resistant in the plasma of human being is A. $\mathrm{H}_{2} \mathrm{PO}_{4}^{-}$ B. $\mathrm{HPO}_{4}^{2-}$ C. $\mathrm{HCO}_{3}^{-}$ D. $\mathrm{H}_{2} \mathrm{CO}_{3}$
Solution
Step 1 ：The most important ACID resistant in the plasma of human beings is \(\boxed{\mathrm{HCO}_{3}^{-}}\)
