【单选题】15-17病人男性,因十二指肠溃疡并发瘢痕性幽门梗阻,反复呕吐宿食,消瘦,皮肤干燥,弹性减退。入院后经充分术前准备,行胃大部切除术。17. 手术后若发生胃肠吻合口出血,最早出现的临床表现是
【简答题】To be effective, hydroelectric dams should be built across rivers with both sufficient head and ______.
【多选题】下列属于我国人民币制度基本内容的有( )。
E.
人民币的单位为“元”,辅币的名称为“角”和“分”
【简答题】Global hydroelectric power in theory is approximately ______ than the amount that has been taken advantage of today.
【判断题】在境外旅游期间,当地导游人员往往会提出一些附加自费项目,若有些项目不挤占正常的团队行程安排,也没有违禁内容,领队可接受安排,但应事先向旅游者说明