单项选择题

A.H2O、HCO-3少,酶量丰富
B.H2O少、HCO-3多,酶量丰富
C.H2O多、HCO-3少,酶量丰富
D.H2O、HCO-3多,酶量丰富
E.H2O、HCO-3多,酶量少