题目：
| 完形填空 One effective way of destroying happiness is to look at something and focus on even the smallest fault.It's like looking at the tiled (铺瓦的) ceiling and concentrating on the space where one tile is __1__. Once I heard a bald man said,"Whenever I enter a room,all I see is hair."Once you've __2__what your missing tile is,explore whether acquiring it will __3__make you happy.Then do one of the three things: get it,replace it with a different __4__,or forget about it and __5__the tiles in your life that are not missing. We all know people who have had a relatively __6__ life,yet are essentially unhappy while people who have suffered a great deal but generally remain happy. The first __7__is gratitude.All happy people are grateful.Ungrateful people cannot be happy.We tend to think that being unhappy leads people to __8__,but it's truer to say that complaining leads to people becoming unhappy. The second secret is awareness.We should __9__that happiness is a byproduct of something else.The most obvious __10__are those pursuits that give our lives purpose-anything from studying insects to playing baseball.The more passions we have,the more happiness we are __11__to experience. Finally,,the belief that something permanent goes beyond us and that our __12__has some larger meaning can help us to feel happier.We need a spiritual faith,,or a philosophy of life.Whatever your philosophy is,it should __13__this truth: if you choose to find the __14__in every situation,you will be blessed,and if you choose to find the awful,you will be cursed.As for happiness itself,this __15__depends on your decision to make. | ||||
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答案：B依题写出热化学方程式：①CH4(g)＋2O2(g)===CO2(g)＋2H2O(l) ΔH＝－890.3 kJ·mol－1，②H2(g)＋O2(g)===H2O(l) ΔH＝－285.8 kJ·mol－1，③C(s)＋O2(g)===CO2(g) ΔH＝－393.5 kJ·mol－1，根据...
