气体和食物的共同通道（）A．口腔 B．咽 C．

气体和食物的共同通道（　　）

　 A．口腔 B．咽 C．喉 D．气管

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气体和食物的共同通道（ ）A． 口腔 B． 咽 C．

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气体和食物的共同通道（）A．口腔 B．咽 C．