便秘,钡灌肠见扩张的肠段,肠段下端呈漏斗状以及直肠持续性狭窄:() ["先天性巨结肠","肠易激综合征","便秘","直肠癌","结肠癌"]
下列气态污染物中,对建筑物有腐蚀作用的有()。 ["二氧化硫","一氧化氮","一氧化碳","甲醛","碳氢化合物"]
便秘与腹泻交替出现,钡灌肠见肠管迅速充盈,遇有强烈收缩时结肠变细,成条索状或结节性痉挛:() ["先天性巨结肠","肠易激综合征","便秘","直肠癌","结肠癌"]
下列疾病可见视网膜电图中a波和b波均下降,除了() ["视网膜色素变性","玻璃体出血","视网膜脱离","脉络膜视网膜炎","视网膜中央动脉阻塞"]
腹痛、腹泻、体重减轻,伴发脓肿、瘘管:() ["克罗恩病","肠结核","溃疡性结肠炎","缺血性肠炎","结肠癌"]
A、B是两家工厂,生产能力每天分别为20,10个单位,X1、X2、X3是三个仓库,现在要把工厂产品通过图所示网络图运到仓库(图中数字为每条线路每天的通过能力),问现有能力能否承担这个任务?
