患者男,27岁,既往有消化道溃疡病史4年,突发上腹部刀割样疼痛,迅速蔓延至全腹,服抗生素后不能缓解,症状加重,6h后于急诊求治。经腹部X线平片诊断为:急性弥漫性腹膜炎,消化性溃疡穿孔。患者于入院半小时后出现烦躁表现,血压70/40mmHg,发生这种状况的原因是()。
A. 脱水和电解质紊乱
B. 细菌毒力强
C. 心肺功能障碍
D. 吸收大量毒素和血容量下降
E. 血浆蛋白降低
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Users report that some shortcuts on the Start menu of their Windows 2000 professional computers are hidden. They want to access their shortcuts without having to click a scroll arrow. How must you configure the client computers to always display all Start menu shortcuts? ()
A. In the Folder Options dialog box, clear the Enable Web content check box in My Desktop Properties
B. In the Display Properties dialog box, clear the Transition effects for menus and tooltips check box
C. In the Folder Options dialog box, clear the Hide file extensions for known file types check box
D. In the Taskbar and Start Menu Properties dialog box, clear the Use Personalized Menus check box.
东汉名将马援,小时候并不怎么样。有一次,他见到同学朱勃,朱勃年方十三,能口诵诗书,举止娴雅,学识渊博。马援见了他很惭愧,他哥安慰说:“朱勃是小器,早成;你是大器,晚成。”马援没有自暴自弃,而是奋发努力,更加刻苦,后来很有作为。这则材料说明了什么?
男性病人,75岁,突发左下肢冷、痛、麻木8小时。有心房纤维颤动史。体检:左小腿中下1/3以下皮温明显降低,足部发绀,患肢无肿胀。双侧股动脉搏动可扪及,左侧腘动脉、足背动脉、胫后动脉搏动均消失,右腘动脉、足背和胫后动脉搏动好。请初步判断该患者的病变平面()
A. 足背动脉
B. 股动脉
C. 腹主动脉
D. 腘动脉
E. 胫前动脉
液压系统混入了空气后,应利用()将空气排出。
A. 排气装置
B. 闭气装置
C. 漏气装置
D. 轻载转车