问题
单项选择题
关于麻醉用气源，以下哪项不正确（）
A.中心供氧氧压恒定在3.5kg/cm2
B.压缩筒氧压150kg/cm2
C.压缩N20满筒时压力为52kg/cm2
D.使用N20时，N20消耗，压力呈逐渐下降
E.N20筒压低于25kg/cm2时应更换新筒
答案
参考答案：D
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关于麻醉用气源，以下哪项不正确（）
A.中心供氧氧压恒定在3.5kg/cm2
B.压缩筒氧压150kg/cm2
C.压缩N20满筒时压力为52kg/cm2
D.使用N20时，N20消耗，压力呈逐渐下降
E.N20筒压低于25kg/cm2时应更换新筒
参考答案：D
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