【单选题】【消耗次数：1】
红细胞的平均寿命约（）天
①
30
②
60
③
90
④
120
⑤
180
参考答案：
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患者血红蛋白60g/L,红细胞 3.1*10 12/L,MCV 67fl,MCH 30%,属于何种类型贫血
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