题目内容
What is wrong about peristalsis?
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According to this TED speech, what are the four main components of the digestive system?
A trio of organs that “break down food using an array of special juices” include the following organs except. （单选题）
____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____.
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