题目内容：
下图是KNO3和NaCl的溶解度曲线。下列说法中正确的是
A.NaCl 的溶解度不受温度的影响
B.t1℃时，100g KNO3 饱和溶液中含有20g KNO3
C.t2℃ 时，KNO3的饱和溶液和NaCl 的饱和溶液中溶质的质量分数不一定相等
D.温度高于t2℃ 时，KNO3的溶解度大于NaCl 的溶解度
参考答案：
选择题：下图是KNO3和NaCl的溶解度曲线。下列说法中正确的是
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