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【单选题】
测定试样中 CaO 的质量分数 , 称取试样 0.9080g ,滴定耗去 EDTA 标准溶液 20.50mL ,以下质量分数结果有效数字位数表示正确的是 ( )
A.
10%
B.
10.1%
C.
10.08%
D.
10.077%
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