【单选题】
超声雾化吸入操作正确的是___
A. 水槽内加冷蒸馏水50ml
B. 用冷蒸馏水稀释药液至10ml
C. 添加药液应先关机
D. 治疗毕，先关电源开关
E. 雾化罐、螺纹管治疗毕需浸泡消毒
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答案
E
解析
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