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【单选题】
医疗上用的生理盐水是0.9%的氯化钠溶液。配制0.9%的氯化钠溶液100g,其中选用仪器或操作正确的是
A.
只需要托盘天平和量筒两种仪器
B.
用托盘天平称量0.9克氯化钠
C.
用量筒量取100克水
D.
把食盐倒入量筒中搅拌溶解
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