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2023国考1号1数学答案

1、2023国考1号1数学答案

2、国考1号2023届高中毕业班基础知识滚动训练英语一答案

3、2023国考1号12仿真卷四英语

第四部分写作（共两节，满分40分）第一节应用文写作（满分15分）Dear fellow students,To enhance the awareness of independence and stimulate the enthusiasm for labour,weappeal to every student to get involved in some housework actively in the summer holidays.It is advocated that we should help do some laundry,sweep the floor and wash the dishes,which are bound to relieve our parents of heavy burden and cultivate our habits of labour.Inaddition,if we take a fancy to cooking,we may as well learn to cook delicious meals withparents at weekends,enjoying the sense of achievement and each other'company.Let's swing into action and experience the happiness of labour practice!The Students'Union

7.A【解析】混合溶液分成两等份，每份溶液浓度与原溶液浓度相同，一份加氢氧化钠溶液时发生反应Cu2++2OH=Cu(OH)2↓，Fe3++3OH=Fe(OH)3Y,由方程式可知每份溶液中2n(SO-)十n(Cl-)=amol,另一份加BaCl2的溶液发生反应Ba2+十SO-一BaSO4Y,由方程式可知n(SO-)=bmol,忽略水的电离，由电荷守恒可知每份溶液中n(C1-)=amol一2bmol=(a一2b),mol,则原混合溶液中氯离子的浓度为(a-26)mol 2(a-26)0.5VLVmol·L-。故选A项。