题目

已知：2Zn(s)＋O2(g) = 2ZnO(s) ΔH＝－701.0kJ·mol－1；2Hg(l)＋O2(g) = 2HgO(s) ΔH＝－181.6 kJ·mol－1。则反应Zn(s)＋HgO(s) = ZnO(s)＋Hg(l)的ΔH为( ) A．＋519.4 kJ·mol－1                    B．＋259.7 kJ·mol－1 C．－259.7 kJ·mol－1                    D．－519.4 kJ·mol－1 答案：CNext put all the ingredients in a big bowl and ________. A．mix up them       B．mix them up       C．mix it up          D．mix up it