题目

向一定溶质质量分数的氯化钠溶液中逐渐加水稀释，下列图象中符合此溶液中溶质质量变化规律的是（ ）A. B. C. D. 答案：【答案】D【解析】向一定溶质质量分数的氯化钠溶液中逐渐加水稀释，溶质的质量不变，溶剂的质量逐渐增加；观察图象D符合此溶液中溶质质量变化规律。故选D。  Wilson is a Canadian boy who has come to live in China with his parents. He wants to practice his Chinese, but he is very shy. What should Wilson do? Please write him a letter to give some good advice. Dear        ，