题目

We all feel it is Jack as well as his wife that ____ for their son’s bad behaviour at school. A. are to blame                    B. is to be blamed      C. are to be blamed                D. is to blame   答案：D  下列说法或表示方法不正确的是(　　) A．盖斯定律实质上是能量守恒定律的体现 B．在稀溶液中：H＋(aq)＋OH－(aq)===H2O(l)；ΔH＝ －57.3 kJ/mol，若将含0.5 mol H2SO4的浓硫酸与含1 mol NaOH的溶液混合，放出的热量为57.3 kJ C．由C(石墨)―→C(金刚石)；ΔH＝＋73 kJ/mol，可知石墨比金刚石稳定 D．在101 kPa时，2 g H2完全燃烧生成液态水，放出285.8 kJ热量，氢气燃烧的热化学方程式表示为：2H2(g)＋O2(g)===2H2O(l)；ΔH＝－285.8 kJ/mol