17.胃腺所分泌的物質,下列何者含量最少?
(A)胃蛋白酶原(pepsinogen)
(B)鹽酸(hydrochloric acid)
(C)內在因子(intrinsic factor)
(D)膽固醇酯酶(cholesterol esterase)

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統計: A(1), B(0), C(0), D(5), E(0) #3977636