外渗性黏液囊肿常由所致() A.外伤 B.炎症 C.过敏 D.感染 E.化学刺激 发布时间:2017-07-26 21:02 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 外渗性黏液囊肿常由所致()A.外伤B.炎症C.过敏D.感染E.化学刺激
题型:单项选择题 A1型题 关系模式R(C,T,H,R,S),有如下函数依赖集: F={C→T,(H,R)→C,(H,T)→R,(H,S)→R} 关系模式R的码是______。A.CB.(H,C.(H,D.(H, 查看答案
题型:单项选择题 A1型题 Like some of my classmates, I can't live up to my teachers' expectations,___ , I let them down. [ ]A. in other words B. after all C. what's more D. more or less 查看答案