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Which of the statements about pancreatic secretion of HCO3- is false ()

A.Secreted by small ductal epithelial cells in the pancreas
B.Cholecystokinin may cause excessive secretion
C.It can prevent the erosion of duodenal mucosa by hydrochloric acid
D.It can provide suitable environment for trypsin
E.Gastric acid entering the duodenum may indirectly stimulate the secretion of HCO3-
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