如題, 為什麼大腸在消化系統裡細菌密度最高, 不是經過了胃嗎?
Why is the density of bacteria in large intestine the highest among the alimentary canal?
收錄日期: 2021-04-15 18:44:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150315000051KK00070