There exist most of mucous cells are in epithelia of intestine,rectum and flank valvae of anus,which is type Ⅱ.
肠、直肠和肛门侧瓣粘膜上皮内有大量粘液细胞,多为Ⅱ
.
There exist most of mucous cells are in epithelia of intestine,rectum and flank valvae of anus,which is type Ⅱ.
肠、直肠和肛门侧瓣粘膜上皮内有大量粘液细胞,多为Ⅱ
.
:以上例
、词性分
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