The wall of the small intestine is divided into 4 layers: mucosa layer, submucosa layer, muscle layer and serosa layer（）_精华吧

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 small intestine is divided into 4 layers: mucosa layer, submucosa layer, muscle layer and serosa layer（）

A.正确

B.错误

正确答案：正确

Tag：动物解剖生理时间：2021-12-25 22:22:16

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