男性患者，58岁，进行性吞咽困难3月余。人院查体，贫血面貌，消瘦明显。X线钡餐透视可见食管3cm长的黏膜皱襞中断，管壁僵硬，钡剂通过缓慢。此患者目前的主要护理问题为（） ["有体液不足的危险","清理呼吸道无效","营养失调：低于机体需要量","焦虑或恐惧","潜在并发症"]
如果单价的灵敏度指标为10%，固定成本的灵敏度指标为4%，则有关因素的极限变动率分别为（）。 ["K1<\/sub>＝－10%","K2<\/sub>＝＋25%","K3<\/sub>＝－20%","K4<\/sub>＝＋25%","K2<\/sub>＝＋20%"]
As an experienced technician, you are responsible forT echnical Support in your company. One of the trainee implement RIP routing contests in MPLS VPN. How to respond?（） [" Routing contexts are implemented in a single routing process."," Routing contexts are implemented using multiple roubng processes."," Routing contexts are implemented as a single instance of several routing processes."," Routing contexts are implemented as several instances of a single routing process."]
操作系统的功能是什么？
在形状公差中，符号“－”是表示（）。 ["直线度","圆度","圆柱度","平面度"]
申购
