主腐熟水谷的是
A．脾B．胃C．大肠D．小肠E．膀胱
参考答案：B
加工顺序的安排原则及为什么？划分加工阶段的原因？
Which of the following is NOT considered as part of the alimentary system ()
A．the pancreas
B．the spleen
C．the tongue
D．the cecum
E． the vermiform appendix
