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Villi and microvilli decrease the mucosal surface area and contribute to digestion and absorption（）
Villi and microvilli decrease the mucosal surface area and contribute to digestion and absorption（）
A.正确
B.错误
正确答案：错误
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动物解剖生理
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The wall of the small intestine is divided into 4 layers: mucosa layer, submucosa layer, muscle layer and serosa layer（）
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The wall of the large intestine is similar to the structure of the small intestine. It is also composed of mucosa, submucosa, muscularis and serosa（）