题目

室温下,将1mol的CuSO4•5H2O(s)溶于水会使溶液温度降低,热效应 △H1,将1mol的CuSO4(s)溶于水会使溶液温度升高,热效应为△H2: CuSO4•5H2O受热分解的化学方程式为CuSO4•5H2O(s)CuSO4(s)+5H2O(l),热效应为△H3,则下列判断正确的是( ) A.△H2>△H3                            B.△H1<△H3     C.△H1+△H3=△H2                        D. △H1+△H2>△H3  Traditionally, college students hold a graduation ceremony to encourage themselves before they ______ on their life journey.A.get throughB.give upC.set offD.settle down
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