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直肠单层柱状上皮与假复层纤毛柱状上皮共存。
The rectum mucosa epithelium is composed of single-layer columnar epithelium and pseudostratified ciliated columnar epithelium.
youdao
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直肠单层柱状上皮与假复层纤毛柱状上皮共存。
The rectum mucosa epithelium is composed of single-layer columnar epithelium and pseudostratified ciliated columnar epithelium.
youdao