兰州文理学院2014-2015年度学年第一学期期末考试

甘肃省兰州第一中学2014-2015学年高二上学期期末考试英语试题第一部分阅读理解（共两节，满分30分）第一节（共10小题；每小题2分，满分20分）阅读下列短文，从每题所给的四个选项中（A、B、C、D）中，选出最佳选项。

ANobody likes home economics(家政学). But restoring the program could help us in the fighting against obesity and chronic diseases today.The home economics movement was founded on the belief that housework and food preparation were important subjects that should be studied scientifically. The first classes occurred in the agricultural and technical colleges that were built in the 1860s. When most departments of universities rejected women, home economics was a back door into higher education.Indeed, in the early 20th century, home economics was a serious subject. When few people understood germ(微生物)theory and almost no one had heard of vitamins, home economics classes offered vital information about washing hands regularly, eating fruits and vegetables and not feeding coffee to babies.However, today we remember only the fixed ideas about home economics, forgetting the movement’s most important lessons on healthy eating and cooking. Too many Americans simply don’t know how to cook. Our diets, consisting of highly processed foods made cheaply outside the home, have contributed to many serious health problems. In the last decade, many cities and states have tried to tax junk food heavily or to ban the use of food stamps to buy soda. Clearly, many people are doubtful about any governmental steps to promote healthy eating. But what if the government put the tools of obesity prevention in the hands of children themselves by teaching them how to cook?My first experience with home economics happened two decades ago when I was a seventh grader in a North Carolina public school. A year later, my father’s job took our family to Wales, where I attended a large school for a few months. It was the first time I had ever really cooked anything. I remember that it was fun, and with an instructor standing by, it wasn’t hard. Those lessons stuck with me when I first started cooking for my husband and myself after college and they will do. Teaching cooking in public schools can help solve some problems facing Americans today. The history of home economics shows it’s possible.1.Home economics ______.A.is a subject becoming more and more popular with AmericansB.is often used to help fight against obesity and chronic diseasesC.once offered women a special approach to university educationD.was first taught in the agricultural and technical colleges in the early 1900s2.The third paragraph mainly tells us ______.A.the importance of regular hand washingB.the health benefits of fruits and vegetablesC.the contents of home economics classes in the early 20th centuryD.the significance of teaching home economics in the early 20th century3.What does the author imply in the last paragraph?A.Her family moved frequently in her childhoodB.Cooking classes have a far-reaching influence on her later life.C.To receive a better education, she went to a large school in WalesD.Teaching cooking is the key to solving Americans’ health problemsBSelf-esteem is all about how much we feel valued, loved , accepted and thought well of by others and how much we value , love and accept ourselves. People with healthy self-esteem are able to do better in school and find it easier to make friends. They tend to have better relationships with others, feel happier, find it easier to deal with mistakes and failures, and more likely to stick to something until they succeed. People with low self-esteem often feel as if no one will like them or accept them or that they don’t do well in anything.The following ways may help you improve your self-esteem.Try to stop thinking negative thoughts about yourself. If you’re used to focusing on your shortcomings, start thinking about positive aspects of yourself that overweigh them. It is good to aim high, but your goals for yourself should be within reach. That’s why you should set practical goals and never expect the impossible. Mistakes are part of learning, so view mistakes as learning opportunities. Accept that you make mistakes because everyone does. Also, you should recognize what you can change and what you can’t. If you realize that you’re unhappy with something about yourself that you can change, start today. If it’s something you can’t change(like your height), start to work toward loving yourself the way you are. Feeling like you’re making a difference and that your help is valued can do wonders to improve your self-esteem. So don’t hesitate to make a contribution. You can lend a hand to a classmate who’s having trouble, help clean up your neighborhood or volunteer to do some other things.Self-esteem plays a role in almost everything you do. It takes some work, but it’sa skill you’ll have for life.4.The passage is mainly about ______.A.what self-esteem meansB.what people with how self-esteem are likeC.how people improve their self-esteemD.what people with healthy self-esteem are like5.We can infer from the passage that ______.A.the old tend to have healthier self-esteem than the youngB.we should build healthy, positive self-esteem when youngC.there are more people with low self-esteemD.it is not easy to build healthy self-esteem6.The underlined word“them” in Paragraph 3 refers to ______.A.your strong pointsB.your weaknesses and faultsC.your aims and goalsD.your classmatesCEarly this month, the Obama Administration called for increased protection of the world’s most southern continent, Antarctica. Scientists say climate change and human activity have increasingly led to the melting of massive pieces of Antarctic ice. The disappearance of ice will not only affect wildlife in the area such as seals and penguins. The melting will also cause oceans and seas around the world to rise. This represents a major threat, especially to coastal areas. For example, the ancient city of Venice, Italy has long been threatened by rising sea levels. The situation is made worse by the fact that its ancient buildings, built on a body of water called a lagoon are slowly sinking. When the city was founded about 1,600 years ago, the levels of the Adriatic Sea was almost two meters lower than it is today. Rising sea levels are not the only threat. The salty water is also destroying Venice’s famous buildings and artworks. The Italian government is trying to fix the problem with the construction of a seven-billion-dollar of moving flood barriers.Climate change is also leading to the melting of ice in other areas, such as Mount Kilimanjaro in northern Tanzania. It is the highest point in Africa, measuring almost 6,000 meters. The mountain supports five vegetation zones and many kinds of animals. The ice glaciers on the mountain are disappearing very quickly. This will have a bad effect on the mountain’s ecosystems and on Tanzania’s travel industry. Also, a valuable record of thousands of years of weather history will also be lost if the ice melts. Scientists study pieces of glacier to understand weather patterns from thousands of years ago.In the United States, the icy masses in Glacier National Park in Montana may soon completely disappear because of climate change, In 1850, there were an estimated 150 glacier in the more than 400,000-hectare park.There are twenty-six glaciers remaining today. Scientists estimate that the glaciers will be gone by 2030. Warning temperatures are also threatening many kinds of plants and animals that live in this mountain ecosystem.7.According to the passage, what has been affected in Italy by rising sea levels?A.Its ancient buildings are slowly sinking.B.Venice’s famous buildings and artworks are also being destroyed.C.The ice glaciers on the mountain are disappearing very quickly.D.Both A and B.8.How many glaciers have disappeared since 1850 in Glacier National Parks?A.Around 150.B.About 26.C.About 400,000.D.Around 124.9.The writer developed the passage mainly by ______.A.listing reasonsB.giving examplesC.making comparisonsing quotations10..What could be the best title of the passage?A.Climate ChangeB.The Melting of Massive Pieces of Antarctic IceC.Visiting Endangered Places around the WorldD.The Disappearance of the Ice Glacier第二节（共5小题；每小题2分，满分10分）根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。

甘肃省兰州第一中学2014-2015学年高二上学期期末考试物理试题说明：本试题分为第Ⅰ卷和第Ⅱ卷，共18小题，满分100分，考试时间100分钟。

答题时请将答案写在答题卡上相应的位置，考试结束后只交答题卡。

第I 卷（选择题，共48分）一、选择题（本题共12小题，每小题4分，共48分。

在每个小题给出的四个选项中，其中1、6、10和12小题有多个选项正确，其余小题只有一个选项正确，全部选对的得4分，选对但不全的得2分，有选错或不选的得0分） 1、下列说法中正确的是A ．磁极之间的相互作用是通过磁场发生的B ．磁感线和磁场一样也是客观存在的C ．一切磁现象都起于电流或运动电荷，一切磁作用都是电流或运动电荷之间通过磁场而发生的相互作用D ．根据安培分子电流假说，在外界磁场的作用下，物体内部分子电流取向变得大致相同时，物体被磁化，两端形成磁极 2、关于对磁感应强度的定义式ILF=B 的理解，正确的是 A ．磁感应强度B 的大小与磁场力F 成正比，与电流强度I 和导线长度L 的乘积成反比 B ．磁感应强度B 的方向由安培力F 的方向决定C ．磁感应强度B 的方向与小磁针N 极的指向相同D ．处在磁场中且与磁场方向垂直的通电导线，在任何情况下所受磁场力F 与电流强度和导线长度的乘积IL 的比都是恒定的，且不为零3、要把动能和速度方向都相同的质子和α粒子分离开，则A ．用电场和磁场都可以B ．用电场和磁场都不行C ．只能用电场而不能用磁场D ．只能用磁场而不能用电场4、如图所示，有a 、b 、c 、d 四种离子，它们带等量同种电荷，质量不等，且m a =m b <m c =m d ，以不等的速率dc b a v v v v <=<进入速度选择器后，有两种从速度选择器中射出，进入B 2磁场，由此可判定 A ．射向P 1的是a 离子 B ．射向P 2的是b 离子 C ．射到A 1的是c 离子D ．射到A 2的是d 离子 5、一个负电荷从电场中的A 点由静止释放，仅在电场力作用下沿电场线由A 点运动到B 点，它运动的v －t 图象如甲图所示。

甘肃省兰州第一中学2014-2015学年高二上学期期末考试数学（文）试题 说明：本试卷分第I 卷（选择题）和第II卷（非选择题）两部分.满分100分，考试时间100分钟.答案写在答题卷（卡）上，交卷时只交答题卷（卡） 第I 卷（选择题） 一、选择题(每小题3分，共30分，将答案写在答题卡上) 1已知为虚数单位，且，则的值为（） A B. C.-4 D. 2.过点P（2，4）且与抛物线y2=8x有且只有一个公共点的的直线有（） A0条 B.1条 C.2条 D..3条 3双曲线的一条渐近线方程是( ) A. B. C. D. 4.下列命题错误的是 ( ) A.命题“若，则”的逆否命题为“若，则” B.若命题，，则“”为： C.“ ”是“”的充分不必要条件 D.若或；q：或，则是的必要不充分条件. 5.曲线与曲线的（）A.焦点相同B.离心率相等C.准线相同D.焦距相等 6.根据右边程序框图，当输入10时，输出的是（） A .12 B.19 C.14.1 D.30 7.如果命题p?q为真命题，p?q为假命题，那么（）A.命题p、q都是真命题B.命题p、q都是假命题C.命题p、q只有一个真命题D.命题p、q至少有一个是真命题 8.设双曲线的一条渐近线与抛物线只有一个公共点，则双曲线的离心率为（） A. B.5 C. D. 9.已知p：关于x的不等式的解集为R；q：关于x的不等式的解集为R，则p是q成立的（）A.充分不必要条件B.必要不充分条件C.充要条件D.既不充分也不必要条件 10.已知F是双曲线的左焦点，E是该双曲线的右顶点，过点F且垂直于x轴的直线与双曲线交于A、B两点，若ABE是锐角三角形，则该双曲线的离心率e的取值范围为( )A.(1，+∞)B.(1,2)C.(1,1+)D.(2,1+) 第II卷（非选择题） 二、填空题（每小题4分，共1分，将答案写在答题卡上） 1的共轭复数是． 12.过抛物线的焦点作倾斜角为直线，直线抛物线，两点，则弦的长是13.已知椭圆与双曲线的公共焦点为F1，F2，点P是两条曲线的一个公共点，则cos∠F1PF2的值为 . 14.若椭圆与直线交于A，B两点，若，则过原点与线段AB的中点M的连线的斜率为 . 兰州一中201-2015学年第一学期高二年级期末数学试题 答题卡（） 第I 卷（选择题） 一、选择题(每小题分，共分) 题号 1 2 3 4 5 6 7 8 9 10 答案第II卷（非选择题） 二、填空题（每小题4分，共1分） 11．__________________ 12．__________________ 13．14．__________________ 三、解答题（本题共5小题，共分） 15（10分），若， （）；（）的值 . 16.（10分）设分别为椭圆的左、右两个焦点. （）若椭圆上的点两点的距离之和等于，椭圆的方程和焦点坐标； （）设点是（）中所得椭圆上的动点，17.（10分）已知命题成立.命题有实数根.若为假命题，为假命题，求实数的取值范围 18.（本题12分）、， 且过点. （1）求双曲线方程； （2）若点在双曲线上，求证：； （3）对于（2）中的点，求的面积. 19.（本题12分）如图，设抛物线：的焦点为F，为抛物线上的任一点（其中≠0），过P 点的切线交轴于点 （），求证； （），过M点的直线抛物线于A、B两点，若，求的值 兰州一中201-2015学年第一学期高二年级期末数学试题 答（） 第I 卷（选择题） 一、选择题(每小题分，共分) 题号 1 2 3 4 5 6 7 8 9 10 答案 C B DD C C D B B 第II卷（非选择题） 三、解答题（本题共5小题，共分） 15．（10分）， …………………………….5分 （2）把Z=1+i代入，即， 得 …………………………….7分 所以 解得 所以实数,b的值分别为-3，4 …………………………….10分 16. （10分）解：（）椭圆C的焦点在x轴上， 由椭圆上的点A到F1、F2两点的距离之和是4，得2a=4，即a=2又点所以椭圆C的方程为…………4分（）设 …………8分又 ………….10分17．（10分） 解： 即命题…………………………分 有实数根…，即…………………………分 因为为假命题，为假命题 则为真命题，所以为假命题，为真命题，：…………………………分 由 即的取值范围是： …………………………1分 18．（本题12分）， 又双曲线过点，解得 故双曲线方程为. ……………………………4分，，∴， ∴，，∴， 又点在双曲线上，∴， ∴，即. ……………………………8分 ,∴的面积为6． ……………………………12分 19．（本题12分）解（Ⅰ）证明：由抛物线定义知， …….2分 设过P点的切线 由 令得， 可得PQ所在直线方程为 ∴得Q点坐标为(0, )∴即|PF|=|QF| ………………………….6分 （Ⅱ）设A(x1, y1)，B(x2, y2)，又M点坐标为(0, y0)∴AB方程为　由得 M P Q y x F O A B M P Q y x F O A B。

甘肃省兰州第一中学2014-2015学年高二上学期期末考试语文试题 注意事项： 1.本试卷分为第Ⅰ卷（阅读题）和第Ⅱ卷（表达题）两部分。

答卷前，考生务必将自己的班级、姓名填写在答题卡上。

2.作答时，将答案写在答题卡上。

3.考试结束后，只交回答题卡。

第Ⅰ卷 阅读题（共 54分） 一、现代文阅读（6分，每小题2分） 阅读下面的文字，完成1~3题。

佛教文献与中国古代文学的关系 高华平 佛教文献对中国古代文体形式的影响，主要表现为佛经文本的文体形式及传播方式，影响了中国古代文体的存在形态并促成新文体的产生。

汉传的佛经文献主要由梵文写成，因此中土的佛教徒接受佛经，首先就要面对梵文。

梵文为拼音文字，古印度人创立了一种关于梵文拼写规则的理论叫“声明论”。

这种“声明论”传入中国以后，即被汉地文人摹拟于佛经的转读，并因此发明了“四声”。

陈寅恪指出，正由于佛经传译使印度“声明论”在中土传播，文人们“于是创四声之说，并撰作声谱，借转读佛经之声调，应用于中国之美化文”，而这种注重汉字声律的理论应用于中国的诗歌创作，便使中国诗歌固有的通过节奏、韵步求和谐的路径发生了改变，产生了以追求文字平仄交替、低昂互节效果的新诗体——“近体诗”或“格律诗”——史书一般称此为“永明体”。

“永明体”的出现，是中国诗歌体裁发生的一次根本的变化，它彻底改变了中国古代文体原有的发展方向。

此外，在佛教经典文本形式的影响下，中国古代小说文体也由先秦两汉记“街谈巷语”的“谈丛”，变成为一种以故事情节取胜的叙事文学体裁。

赞颂、传记体裁，前者转变成了韵散兼行的形式，后者则变成了具有一定传奇色彩的“游记”或“旅行记”。

当然，最能反映佛教文献对中国古代文体发生影响的，是从中古时代起中国社会出现了许多具有模拟佛经文体性质的、宣传经义或世俗故事以吸引信众的新文体、俗文体，重要的如变文、俗赞、偈颂、戏曲等。

例如“变文”是“讲唱”的。

讲的部分用散文；唱的部分用韵文。

2014—2015学年度上学期期末考试高一年级语文科试卷命题学校：大连市第24中学命题人：王远香校对人：张岩考试时间：150分钟满分：150分第Ⅰ卷阅读题甲必考题一、现代文阅读（9分，每小题3分）阅读下面的文字，完成1～3题。

汉服运动：文化焦虑与认同危机面对悄然兴起的‚汉服运动‛，我心情异常复杂。

这一运动的个体性或小团体性，使得他们的行为在消费时代显得有些尴尬，甚至会引来颇多人的误解。

无论如何，它都不可能像超女那样引来广泛的参与，不管是支持还是反对。

每个时代有每个时代的文化焦虑，而我们这个时代最大的焦虑则在于对文化存在的忘却和对焦虑的失语。

我们既承接了上个世纪自觉地传统断裂形成的文化失序、异域接续的文化混乱，又面临着日益紧张的全球化造成的文化同一。

‚历史形成的各种文明与文化开始同自己的根源相脱离，它们融合到技术、经济的世界中，融合到一种空洞的理智主义中。

‛（卡尔〃雅斯贝斯）然而，这种趋势几乎是不可抗拒的。

全球化首先是资本的全球化，然后，文化舶来品依靠资本的流动和输出广泛传播。

资本处于强势的，其文化也会自然处于一种主动的强势地位，以美国为最显著的例子。

‚肯德基‛‚麦当劳‛‚可口可乐‛……首先是一种资本和商业行为，然后成为一种具体的、渗透性的文化行为。

这种文化的殖民化不再倚重于武装侵略，但是其影响却显然更大。

中国面对这样的环境已经有一百多年了，让我们痛心的是，当我们回首这充满动荡和文化嬗变的百年时，传统文化的流失和歧变触目惊心。

事实上，和‚汉服运动‛的动机一样，早在‚五四‛就有文化保守主义反对全盘西化，有‚国剧运动‛，有‚新格律诗‛，进入当代也有新儒家和文化‚寻根‛，有重倡‚读经‛，有弘扬‚京剧‛，但是他们都没能阻挡资本输出带来的文化传播，也有人叫做文化侵略，或者后殖民。

满眼望去，‚一个民族的全部生活方式，从出生到走进坟墓，从清早到夜晚，甚至在睡梦之中‛（艾略特）都被一种区别于中国传统文化的多重异质文化所覆盖。

注意事项：1．本试卷分第一卷（选择题）和第二卷（非选择题）两部分。

2．本试卷满分120分，考试用时100分钟。

3．答题全部在答题纸上完成，试卷上答题无效。

第I卷(选择题，共85分)第一部分英语知识运用（共两节，满分45分)第一节单项填空(共15小题; 每小题1分，满分15分)从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

1．Mr．Hua, headmaster of our school, made speech at the opening ceremony of the competition.A．the; 不填B．不填；the C．a; 不填D．不填；a 2．—Are you still angry with Tom?—, but I can’t deny that his remarks made me disappointed.A．Not at all B．Just a little C．Not really D．Never mind3. The booklet is very and handy of reference.A．reasonable B．practical C．optional D．legal 4．—What do you think of the New Year’s party held in your class last week?—I really enjoy it．I didn’t expect it was wonderful.A．too B．rather C．most D．that 5．—May I use your PSP?—Sorry, something’s wrong．It .A．is repairing B．is being repaired C．will be repaired D．has been repairing6．Look at this year's sales figures last y ear's; they’re much better．A．with B．from C．against D．between 7．The minute I saw my last girlfriend, her name simply me, and I stood there not knowing how to address her.A．escaped B．failed C．choked D．confused 8．The more active you are, the more likely you'll be new friends．A．made B．to make C．making D．to have made 9．Large quantities of information, as well as some timely help, since the organization was built.A．has offered B．had been offered C．have been offered D．is offered 10．It is high time that immediate measures _____ to better the strength and face the challenges.A．were taken B．be taken C. had been taken D．have been taken 11．_____ that made me angry.A．It was he passing by B．It was his passing byC．It was his passed by D．It was because he passed by 12．In our school, there are 150 teachers, two thirds are male.A．in whom B．in them C．of whom D．of them13．Driver as he is, he has a real for the work.A．influence B．affection C．appreciation D．enthusiasm 14．—A pleasant day, isn’t it?— Yes．I love when the weather is like this．Why not have barbecues outside?A．it B．this C．one D．that15. Do you have any special interests __________your job?A. rather thanB. together withC. but forD. other than第二节完形填空（共20小题；每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的四个选项(A、B、C和D) 中，选出可以填入空白处的最佳选项。

考前注意事项：●试卷统一用A4纸打印后交给任课老师。

●试题中的题录保存统一按以下标准格式着录：1.期刊论文格式主要责任者．文献题名［J］.刊名，出版年份，卷号(期号)：起止页码．如：袁庆龙，候文义．Ni-P合金镀层组织形貌及显微硬度研究［J］.太原理工大学学报，2001，32(1)：51-53.2.学位论文格式主要责任者．文献题名[Ｄ]．保存地：保存单位，年份如：张和生．地质力学系统理论[Ｄ]．太原：太原理工大学，1998.3. 图书格式主要责任者．书名．出版地：出版者，出版年如：刘国钧，郑如斯．中国书的故事[M].北京：中国青年出版社，1979.●在提示处拷贝屏幕。

操作如下：点击键盘Print Screen键（或prt scr），在题目结尾处点击鼠标右键粘帖界面即可。

屏幕图可适当缩小。

拷贝屏幕要看到检索词和检索式。

请不要用QQ截图要看2014-2015第一学期《文献信息检索与利用》考核题姓名：学号：学院：年级： 2013级专业：任课老师：刘冬莲成绩：一、自拟一道与本专业有关的检索课题进行检索，至少应包括三个（含三个）以上的主题。

（温馨提示：自拟的题目不能和其他同学重复，主题重复，试卷退回重做或做不及格处理。

）题目：（如：检索2000以来有关海南国际旅游岛制度建设方面的信息）1、使用CNKI数据库、重庆维普期刊数据库或者万方数据资源系统检索与课题密切相关学术论文，写出检索词、检索式（检索式包括检索词、检索途径、检索词之间的逻辑关系）、检出的结果数，保存三条记录的题录。

（10分）选择的检索工具：检索词：检索式：（如：主题=海南 * 题名=国际旅游岛 * 题名=（体制＋制度＋架构））其他检索限制（如：模糊、精确、时间等）检出结果数：三条题录：a．b．c．（拷贝屏幕粘贴处）2、使用CNKI学位论文数据库或万方学位论文数据库，检索该课题的学位论文，写出检索词、检索式（检索式包括检索词、检索途径、检索词之间的逻辑关系）、检出的结果数，保存题录三条。

甘肃省兰州第一中学2014-2015学年高二上学期期末考试化学试题 说明：本试卷分第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分。

满分100分，考试时间100分钟。

答案写在答题卡上，交卷时只交答题卡。

可能用到的相对原子质量：Cu 64 O 16 一、选择题（每题只有一个正确的选项每题2分） 下列热化学方程式书写正确的是(ΔH的绝对值均正确) A．C(s)＋ O2(g)＝CO(g) ΔH＝－110.5kJ·mol－1 (燃烧热) B．2H2O(g)＝2H2(g)＋O2(g) ΔH＝＋483.6 kJ·mol－1(反应热) C．C2H5OH＋3O2＝2CO2＋3H2O ΔH＝－1368.8 kJ·mol－1(反应热) D．2NaOH(aq)＋H2SO4(aq)＝Na2SO4 (aq)＋2H2O(l) ΔH＝－114.6 kJ·mol－(中和热) 根据图，下列判断中正确的是 A．烧杯a中的溶液pH升高 B烧杯a中发生的反应为2H2O＋2e－＝H2↑＋2OH－ C烧杯b中发生还原反应 D烧杯b中发生的反应为2Cl－－2e－＝Cl2↑ A．Fe2+、Mg2+、ClO-、Cl- B．含Br-、K+、Na+、HSO3- C．含K+、Na+、NO3-、CH3COO-c(H+) D．硝酸钠和碘化钡混合溶液中，溶质离子浓度为c(Ba2+）=0.2mol·L－1，c（Na+）=0.2mol·L－1，c（NO3-）=0.3mol·L－1，c（I-）=0.1mol·L－1 25.00mLKMnO4溶液,可选用的仪器是： A．50mL量筒 B. 10mL量筒 C．50mL酸式滴定管 D. 50mL碱式滴定管 5.下列说法不正确的是： A． Ksp只与难溶电解质的性质和温度有关 B．由于Ksp（ZnS）＞Ksp（CuS） C．其他条件不变，离子浓度改变时， Ksp不变 D．两种难溶电解质作比较时， Ksp小的，溶解度一定小 6.图中a曲线表示一定条件下可逆反应X(g)+Y(g)2Z(g)+W(s)，△H＜0的反应过程。