题目内容
A trio of organs that “break down food using an array of special juices” include the following organs except. （单选题）
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____supports and positions all digestive organs in the abdomen.
The enzymes of the pancreatic and intestinal juices break proteins into ____, carbohydrates into____, and fat molecules into fatty acids and____.
The byproducts of digestion exit through the____
采用薄膜过滤法进行微生物限度检查时，滤膜孔径和直径一般分别为：
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