问题
单项选择题
有高碳酸血症的慢性呼吸衰竭者,最适宜的吸氧浓度是
A.15%~20%
B.25%~30%
C.35%~40%
D.40%~50%
E.>50%
答案
参考答案:B
有高碳酸血症的慢性呼吸衰竭者,最适宜的吸氧浓度是
A.15%~20%
B.25%~30%
C.35%~40%
D.40%~50%
E.>50%
参考答案:B
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5. How much are the shoes? _________________________ |