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一位巨幼细胞贫血患儿肌内注射维生素B12(规格0.5mg/ml),按一次剂量为25~50μg给药,应抽取的药液是()
- A、0.025ml~0.05ml
- B、0.05ml~0.10ml
- C、0.10ml~0.20ml
- D、0.15ml~0.30ml
- E、0.20ml~0.40ml
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