单选：血液中氧化碳的含量测定必须：（）A．采耳血B．采肘正中静脉血C．采毛细血管血D．采心脏内大血管血

题目分类：基础医学
题目类型：单选
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题目内容：

血液中氧化碳的含量测定必须：（）
A．采耳血
B．采肘正中静脉血
C．采毛细血管血
D．采心脏内大血管血

参考答案：

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