茶碱的有效血浆浓度范围是A.1-5μg/ml B.0.05-1μg/ml C.5-20μg/ml D.20-30μg/ml E.30-40μg/ml

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问题 茶碱的有效血浆浓度范围是

选项 A.1-5μg/ml
B.0.05-1μg/ml
C.5-20μg/ml
D.20-30μg/ml
E.30-40μg/ml

答案C

解析
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