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问题描述：

[单选] 电器开关抹尘，必须用（），以免将开关周围墙面弄脏。
A．干抹布 B．半干的抹布 C．湿抹布
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随机题目

以下哪一种给药途径将获得血清药物浓度最低？Which of the following routes of medication administration would provide the lowest serum drug concentration？
31岁男性因呼吸困难被送到急诊科就诊。他有哮喘病史，有多次哮喘发作需要插管维持气道。他没有依从为这种情况开的药物。体格检查显示一名年轻男子极度痛苦。他房间的空气氧饱和度是87%。除给氧外，沙丁胺醇应通过下列哪一种途径立即给药？A 31-year-old man is brought to the emergency department complaining of dyspnea． He has a history of asthma and has had multiple asthma attacks requiring intubation for airway maintenance． He is noncompliant with his medications prescribed for this condition． Physical examination reveals a young man in acute distress． His room air oxygen saturation is 87%． In addition to administration of oxygen， immediate drug administration of albuterol should be administered by which of the following routes？
在局部用药的情况下，以下哪个步骤是达到血浆治疗药物浓度的最关键的？In case of tropical use of drug administration which of the following steps is most critical to achieve a therapeutic drug concentration in plasma？
肉毒杆菌毒素导致瘫痪是由于（）？Botulinum toxin causes paralysis by（）？
急性心力衰竭的急诊治疗，用下列哪一种药物最好？Emergency treatment of acute heart failure is best managed with which of the following drugs？
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