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【单选题】
称取含有KCl与KBr的混合物0.3028g，溶于水后用AgNO3标准溶液滴定，用去0.1014mol/L的AgNO3溶液30.20mL，则该混合物中 KCl和KBr的质量分数分别为[已知M(KCl)=74.55g/mol；M(KBr) =l19.0g/mol]A.
34.l5% ，65.85%
B.
65.85%，34.l5%.
C.
68.30% ，3l.70%
D.
17.08%，82.92%
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