下述哪项不是痔形成的因素() A.无静脉瓣 B.静脉壁薄弱,结缔组织萎缩缺乏支持 C 发布时间:2017-09-12 16:22 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 下述哪项不是痔形成的因素()A.无静脉瓣B.静脉壁薄弱,结缔组织萎缩缺乏支持C.直肠上、下静脉丛畸形D.腹压增高E.直肠肛管慢性感染
题型:单项选择题 A1型题 I wrote _____ my brother last Saturday, but I haven't heard _____ him up to now. [ ]A. from; to B. to; ofC. to; to D. to; from 查看答案