F.3 biology 消化系統 - 消化液
F.3 biology 消化系統 - 消化液 不同消化液的成份及功能 蠕動 - 讓食物和消化液混合 - 增加消化道壁與己消化的接觸，促進食物的吸收
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YU CHUN KEUNG MEMORIAL COLLEGE
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F.3 biology 消化系統 - 消化液 不同消化液的成份及功能 蠕動 - 讓食物和消化液混合 - 增加消化道壁與己消化的接觸，促進食物的吸收
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YU CHUN KEUNG MEMORIAL COLLEGE
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