当病人吸入氧气流量为5L/min时其氧浓度是（）
A.29%
B.33%
C.37%
D.41%
E.45%
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正确答案： D 答案分析：无
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A.29%
B.33%
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A.29%
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C.37%
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A.29%
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C.37%
D.41%
E.45%
A.29%
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C.37%
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A.29%
B.33%
C.37%
D.41%
E.45%
A.29%
B.33%
C.37%
D.41%
E.45%
A.29%
B.33%
C.37%
D.41%
E.45%
A.29%
B.33%
C.37%
D.41%
E.45%
A.29%
B.33%
C.37%
D.41%
E.45%
A.29%
B.33%
C.37%
D.41%
E.45%
