【单选题】【消耗次数：1】
60．反刍动物前胃(瘤胃、网胃、瓣胃)的黏膜上皮为
①
A．单层立方上皮
②
B．单层柱状上皮
③
C．变移上皮．
④
D．假复层纤毛柱状上皮
⑤
E．复层扁平上皮
参考答案：
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