肛门内括约肌的主要作用是:() ["括约肛门","支持肛管直肠,防止脱垂","帮助排便","载托盆内脏器","保持直肠和肛管的角度"]
手术时切断后会造成肛门失禁的组织是:() ["外括约肌皮下部","外括约肌浅部","外括约肌深部","内括约肌","肛管直肠环"]
因特殊情况不能参加义务植树活动的怎么办?
直肠全长大约是:() ["3cm","6cm","9cm","12cm","15cm"]
下面关于肛门直肠解剖名词的说法,错误的是:() ["直肠柱又称肛柱","直肠瓣又称肛门瓣","肛隐窝又称肛窦","希耳顿线相当于括约肌间沟","肛乳头又称肛乳突"]
哪些人必须参加全国义务植树活动?