题目

In the future, the US policy is likely to be strongly determined by internal developments in a number of key states, _______China and Russia.        A .particularly         B. namely       C. absolutely          D. eventually    答案：A 25℃、101 kPa下，2 g氢气燃烧生成液态水，放出285.8 kJ热量，表示该反应的热化学方程式正确的是 [　　] A． 2H2(g)＋O2(g)2H2O(1)　ΔH＝―285.8 kJ/mol B． 2H2(g)＋O2(g)2H2O(1)　ΔH＝＋571.6 kJ/mol C． 2H2(g)＋O2(g)2H2O(g)　ΔH＝―571.6 kJ/mol D． H2(g)＋O2(g)H2O(1)　ΔH＝―285.8 kJ/mol