[名词解释] 呼吸道隔离

下面哪一个不是问卷的顺序（）。 ["时间顺序","内容顺序","字母顺序","类别顺序"] “贫富虽殊，药施无二。”这句话出自（）。 ["妙闻集","孙思邈","华佗","龚廷贤"] 下列（）不能放入砝码的调整腔内 ["纸屑","铜丝","铅","锡"] 下列哪种抽样方法得到的样本代表性最差？（） ["单纯随机抽样","分层抽样","整群抽样","系统抽样","便利抽样"] 简述左心衰竭的临床表现。 呼吸道隔离