, the following digestive juice, does not contain digestive enzymes is ()

Answer analysis test analysis: Bile is secreted by the liver, and the digestive juice stored in the gallbladder has the function of emulsifying fat into fat particles and promoting the digestion of fat, but it does not contain digestive enzymes and has no digestion effect. Therefore, choose A

test center: this question examines the composition of digestive juice, which is intended to test the ability of candidates to understand the main points of what they have learned and grasp the internal relationship between knowledge.