[VIP专享]北京市石景山区2018年中考一模试题

北京市石景山区2018届中考化学一模试题学校姓名准考证号可能用到的相对原子质量H 1 N 14 O 16 Na 23 S 32 K 39 Ca 40第一部分选择题（共12分）（每小题只有一个选项符合题意。

每小题1分。

）1．下列制作蛋糕的原料中，富含蛋白质的是A．面粉B．鸡蛋C．白糖D．橄榄油2．下列气体能供给动植物呼吸的是A．H2B．O2C．N2D．CO2 3．下列元素中，人体摄入量过低会引起贫血的是A．Fe B．Zn C．Na D．Ca 4．下列符号中，表示2个氢分子的是A．H2B．2H C．2H2D．2H2O 5．铁锅能烹饪食品，说明铁具有良好的A．导电性B．延展性C．导热性D．抗腐蚀性6．水晶的主要成分是二氧化硅（SiO2），SiO2中硅元素的化合价为A．﹣4 B．﹣2 C．﹢2 D．﹢4 7．下列实验操作中，正确的是AB．过滤C．取用粉末药品D．点燃酒精灯8二氧化碳用途的是A．用作燃料B．制碳酸饮料C．用于灭火D．植物的光合作用9．下列金属中，不能．．从CuSO4溶液中置换出Cu的是A．Fe B．Zn C．Mg D．Ag10．下列物质露置于空气中，一段时间后，质量减小的是A ．浓盐酸B ．浓硫酸C ．氢氧化钠D ．碳酸钙 11．甲和乙在点燃条件下生成丙和丁，结合微观示意图分析，下列结论不正确．．．的是A ．1个甲分子由5个原子构成B ．生成丙和丁的分子个数比为1:2C ．该化学反应前后，原子种类保持不变D ．丁物质中氢和氧元素质量比为2:1 12．右图是a 、b 两种固体物质的溶解度曲线。

下列说法中不正确．．．的是 A ．a 物质的溶解度随温度的升高而增大 B ．t 2℃时b 物质的溶解度比a 物质的溶解度大 C ．M 点表示在t 1℃时a 、b 两种物质的溶解度相等 D ．升高温度可以将a 、b 的饱和溶液转化为不饱和溶液第二部分 非选择题（共33分）〖生活现象解释〗 13．（4分）采用熔盐蓄热储能的光热发电站，其工作原理如下图所示。

石景山区2018年初三统一练习历史学校姓名准考证号第Ⅰ卷选择题（共45分）本大题共30小题，每小题1.5分，共计45分。

每题只有一个正确选项。

1. 若以“我国境内著名的原始人类”为题开展研究性学习，主要的证据来源应该是A. 神话传说B. 史书记载C. 学者推断D. 考古发掘【答案】D【解析】依据所学知识可知，考古发掘是对古代的遗迹和遗物，进行科学的研究，是进行原始人类研究的科学依据。

ABC项不具有真实性和科学性，不能成为研究我国境内著名的原始人类的证据来源。

故选D。

2. 下图是北京西周燕都遗址博物馆中青铜器克罍（léi）的铭文拓片，其大意为：周王对太保说，我非常满意你的供奉，命你的儿子可做燕地的君侯。

该铭文拓片可直接用于研究A. 禅让制B. 郡县制C. 分封制D. 世袭制【答案】C【解析】根据材料中的关键信息“西周”和材料中的大意可知，这是西周时期实行的分封制，周天子将土地和人民分封给诸侯后，诸侯必须承担对天子纳贡等义务。

A项是尧舜禹时期实行的制度；B项是秦朝实行的制度；D项世袭制是从夏朝的启开始实行的王位继承制度。

C项符合题意，故选C。

3. 许多成语来源于历史。

一位同学搜集了如下的成语：退避三舍、卧薪尝胆、围魏救赵和纸上谈兵，从这些成语可以看出春秋战国时期的特点之一是A. 经济快速发展B. 国家实现统一C. 学术思想活跃D. 军事战争不断【答案】D【解析】依据所学知识可知，退避三舍出自城濮之战；卧薪尝胆指的是越国国王勾践励精图治以图复国的故事；围魏救赵出自桂陵之战；纸上谈兵出自长平之战。

这些都与军事战争有关，所以从这些成语可以看出春秋战国时期的特点之一是军事战争不断。

ABC项与材料内容不符，故选D。

点睛：解答本题的关键是知道退避三舍、卧薪尝胆、围魏救赵和纸上谈兵这些成语的出处，由此可以看到这些成语都与战争有关，即可做出正确的选择。

4. 小明的考试成绩不理想，家长安慰他说：“这次考差了不全是坏事，你如果能认真反思，及时发现问题，找到解决问题的对策，坏事就可能变成好事。

2018年北京市石景山区中考物理一模试卷一、单项选择题（下列各小题均有四个选项，其中只有一个选项符合题意．共30分，每小题2分）1．（2分）下列餐具中，通常情况下属于导体的是（）A．玻璃杯B．竹筷C．陶瓷碗D．不锈钢汤匙2．（2分）如图所示的四种现象中，属于光的反射现象的是（）A．我国古代利用日晷计时B．桥在水中形成倒影C．月食的形成D．动物经小孔成倒立的像3．（2分）为了提高全民健身意识，增强国民体质，相关部门在居民区里安装了图2所示的健身器材，下列器材在使用过程中为了减小摩擦的是（）A．划船器座椅上的凸起圆点B．背部按摩器上的凸起圆点C．漫步机上的脚踏滚动圆环D．腿部按摩器上的楞条形花纹4．（2分）语音智能门禁系统能“辨音识人”，这主要是依据声音的（）A．音色B．音调C．响度D．频率5．（2分）如图所示的四个实例中，属于增大压强的是（）A．书包的背带较宽B．运输车装有很多轮子C．滑雪板的面积较大D．安全锤头部做成锥形6．（2分）下列措施中，能使蒸发减慢的是（）A．把盛有酒精的瓶口盖严B．把湿衣服晾在通风向阳处C．用电吹风给湿头发吹风D．将地面上的积水向周围扫开7．（2分）如图所示的工具中，使用时属于费力杠杆的是（）A．天平B．瓶盖起子C．食品夹D．钳子8．（2分）下列事例中，属于用热传递的方式改变物体内能的是（）A．用锯条锯木头，锯条温度升高B．用炉灶烧水，水温升高C．气缸内气体被压缩，温度升高D．用力搓手，手会发热9．（2分）如图所示，下列说法正确的是（）A．物体的长度为2.2mB．通电螺线管左端为S极C．弹簧测力计的示数为2ND．温度计的读数为43℃10．（2分）关于安全用电，下列做法中正确的是（）A．更换灯泡时先断开电源开关B．在高压线下放风筝C．家用电器电线绝缘皮破损了仍继续使用D．用湿布擦拭正在工作的电视机11．（2分）如图所示电路中，电源电压保持不变，当变阻器滑片P向右移动时，电表示数变大的是（）A ．B ．C ．D ．12．（2分）小明参观了中国科技馆“探索与发现”展厅A区后，用矿泉水瓶和小玻璃瓶制作了“浮沉子”如图所示。

北京市石景山区2018年中考一模数学试题一、选择题1．据北京市商务委表示，除夕至初五，21家节能减排补贴商品定点销售企业销售额超过28 000 000元．将28 000 000用科学记数法表示应为（）A．0.28×108B．2.8×108C．2.8×107D．28×106【考点】科学记数法和近似数、有效数字【答案】C【试题解析】科学记数法是把一个数表示成 a×的形式，其中1≤|a|<10，n为整数．所以28 000 000=2．8．故本题选C．2．如图，数轴上有A，B，C，D四个点，其中绝对值小于2的数对应的点是（）A．点A B．点B C．点C D．点D【考点】实数的相关概念【答案】B【试题解析】绝对值小于2的数也就数轴上与原点距离小于2的点对应的数。

可知点B 的绝对值小于2．故本题选B．3．下列四个图形分别是四届国际数学家大会的会标，其中不属于中心对称图形的是（）A．B．C．D．【考点】中心对称与中心对称图形【答案】A【试题解析】在平面内，把一个图形绕着某个点旋转180°，如果旋转后的图形能与原来的图形重合，那么这个图形叫做中心对称图形．图形B,C,D都是中心对称图形。

故本题选A．4．某校师生植树节积极参加以组为单位的植树活动，七个小组植树情况如下：则本组数据的众数与中位数分别为（）A．5，4B．6，5C．7，6D．5，5【考点】平均数、众数、中位数【答案】D【试题解析】众数就是在一组数据中，出现次数最多的数据叫做这组数据的众数。

所以这组数据的众数是5,。

中位数就是将一组数据按大小依次排列，把处在最中间位置的一个数（奇数个时数）或最中间两个数的平均数（偶数个时）叫做这组数据的中位数。

这组数据从小到大排列为：4， 5， 5， 5， 6， 6， 7．最中间的数是5，所以这组数据的中位数是5．故本题选D．5．脸谱是中国戏曲演员脸上的绘画，用于舞台演出时的化妆造型，助增所扮演人物的性格和特征．在下列八张脸谱图片中，随机抽取一张为的概率是（）A．B．C．D．【考点】概率及计算【答案】D【试题解析】共8张脸谱，其中有3张，所以随机抽取一张为的概率=。

2018 年北京市石景山区中考英语一模试卷副标题题号I II III IV V总分得分一、单选题（本大题共12 小题，共 12.0 分）1.Tom is a big boy now. This coat is too short on ____.A. herB. himC. itD. them2.I met Lily ______ a bookstore yesterday.A. onB. toC. inD. of3.The music was too loud, ______I turned it down.A. soB. becauseC. hutD. or4.—— _you get over here in about the minutes?---Oh, no, I can ’ t come now. I'm busy.A. CanB. ShouldC. MustD. May5.Look! The kids _____ about the park.A. runB. ranC. were runningD. are running6.Wu Dajing _______a gold medal I n February,20 1 8 at the Winter Olympics.A. winB. wonC. has wonD. will win7.I ______3 00 stamps since last yearA. collectB. collectedC. have collectedD. will collect8.The shoes at this store are much________than at the other.A. cheapB. cheaperC. cheapestD. the cheapest9.The flower show _____ at the park two weeks ago.A. holdsB. heldC. was heldD. is held10.The teacher told us ______ a report about the animals in danger.A. writeB. wroteC. writingD. to write11.You __ the chance if you go home now.A. will missB. missedC. missD. have missed12.I am not sure ____ to the party tomorrow.A. when did he comeB. when he cameC. when will he comeD. when he will come二、完形填空（本大题共8 小题，共12.0 分）A little holiday magicChristmas Eve has always been my favorite day of the year. December 24,2010, I decided to (13) a little last- minute shopping before joining my family at my mother?s.I bought a large basket of cheeses and a bottle of wine. On my way down, the elevator（电梯）stopped at the third floor. where everybody but an older couple and me got off--and where a tall, handsome man (14) ． We started down again; then suddenly the elevator stopped. We were stuck--on Christmas Eve!(15)there was a phone and the old man called someone in maintenance（维修） ,who toldus that we had to be in for a 1ong wait.At that point. We--the older couple, Mr. and Mrs. Philips; John, the handsome man; and I--sat down on the floor and began (16) Christmas memories. An hour passed, then two; we found ourselves so involved in the conversation that we forgot we were stuck. I shared my basket of cheeses and wine with them. I didn?t realize at the time we were creating another special Christmas (17) ．After five hours, the elevator finally moved .When the doors opened, the worried store manager was surprised to find us in such (18) spirits. Saying our good-byes, the four of us exchanged addresses and promised to send holiday greeting to each other in the years to come.I got to my mother?s for our tradition al family Christmas--a bit late ， (19) I got there.Christmas evening I returned to my apartment. Waiting for me was a single red rose and a message: I really miss the cheese basket. John. At the bottom was his phone numberJohn and I were married the following Christmas Eve. And we are(20) exchangingChristmas greetings with Mr. and Mrs. Phillips. And I still wake up every ChristmasEve Morning filled with excitement at the magic of the day.13. A. make B. do C. show D. accept14. A. got up B. got down C. got off D. got on15. A. Sadly B. Proudly C. Luckily D. Strangely16. A. sharing B. losing C. comparing D. studying17. A. accident B. game C. record D. memory18. A. high B. low C. common D. true19. A. so B. but C. or D. because20. A. even B. already C. still D. yet三、阅读理解（本大题共13 小题，共26.0 分）AJOIN TODAY!What are you going to do this year? There are lots of after-school clubs for youto choose from!Make New FriendsAre you friendly and talkative'? Then the Welcoming Committee is just for you_ Come and meet new or younger students who are quiet and shy. Talk withthem every Monday and help them make new friends.Laughter is the Best MedicineCan you make people laugh? You should join the Comedy Club. We meet every Tuesday to play games and learn new jokes. We also go to the children's hospital to play games with children who are sick.Fun with SportsAre you good at sports? Then come to the Sports Club every Friday! You can join the basketball, football. or swimming teamPainters Paint TogetherAre you good at drawing? Every Sunday, members of the Art Club get together to take art lessons. Once a month, we go to the art museum to see all the famous paintings there. Sometimes, we go _to a home for older people and make things for them.Go to the school website and join a club today!21.If you are friendly and talkative, the ____is just for you.A. Art ClubB. Sports ClubC. Welcoming CommitteeD. Comedy Club22.Students in the Comedy Club often get together to _____A. learn new jokesB. take art lessonsC. make new friendsD. make things for old people23.Students in the Sports Club meet every _____A. MondayB. TuesdayC. FridayD. SundayBThink Before You SpeakIt was a sunny day. Everyone in the station was waiting for the train to arrive_ There wasa group of friends, youngsters who were on board for vacation.The train entered the station and the group ran to get their seats before anyone could get into the train.An old man with a young boy aged around 15 came mining to catch the train. They entered the train and the train started to move, They had their seats just next to the friends' group.The young boy was so surprised to see everything.He acclaimed ( 欢呼 ) at his father, “Dad. the train is moving and the things aremoving backwards. ”His father smiled and nodded his head. As the train started moving fast, the young boy again screamed,“Dad. the trees are green in colour and run backward very fast. ” His father said., "Yes, dear" and smiled.Just like a kid, he was watching everything with great excitement and happiness.A fruit seller passed selling, apples and oranges. The young boy said to his dad, ''I want to eat apples." His father bought him apples. He said, "Oh. apple looks so sweet and I love this colour."The group was watching all the activities of this boy and asked the boy's father, "Is your son having any problems? Why is he behaving so differently?" A friend from the group made fun of him and shouted, “ His son is mad I think. ”The father of the young boy, with patience, replied to the friend-group, "My son was born blind. Only a few days ago he was operated and got the vision. He is seeing so many different things in his life for the first time."The young friends became very quiet and said sorry to the father and son.24.Where did the story happen?A. At a bus station.B. At a fruit shop.C. On a train.D. In a hospital.25.The young group ____ the boy after they knew his story.A. made fun ofB. said sorry toC. shouted angrily atD. became impatient with26.What do we know about the boy?A.He was 10 years old.B.He had an eye operation.C.He felt mad about the group.D.He was one of the group's friends.CIn life we sometimes have disagreements with people. It could be with your parents, or with a friend. When this happens, the important thing is to try not to let a calm （平静的） discussion turn into a heated argument. But of course this is easier said than done.The first thing is that the way you begin the conversation is very important. Imagine you are a student and you share a flat with another student who you think isn't doing her share of the housework. If you say, "Look, you never do your share of the housework. What are we going to do about it?", the discussion will very soon turn into an argument. it's much more helpful to say something like, "I think we'd better have another look about how we divide up the housework. Maybe there's a better way of doing it."The second piece of advice is simple. If you're the person who is in the wrong, just admit (承认 ) it This is the easiest and best way to avoid an argument. Just apologize ( 道歉 ) toyour flatmate, your parents, and move on. The other person will have more respect for you in the future if you do that.And the final tip is that if necessary, call“ Time Out ” ,like in a sports match. If you think that an argument is getting out of control ，then you can say to the other person, "Listen, I'd rather talk about this tomorrow when we've both calmed down."You can then continue the discussion the next day when perhaps both of you are feeling less angry. That way there is much more chance that you will be able to reach an agreement.One last important thing. Some people think that arguing is always bad. This is nottrue,Conflict（冲突）is a normal part of life, and dealing with conflict is an important part of any relationship, whether it's three people sharing a flat, or just two good friends .If you don't learn to argue properly, then when a real problem comes along, you won't be prepared to face ittogether. Think of the smaller arguments as training. Learn how to argue cleanly and fairly. Itwill help your relationship become stronger and last longer.27.According to the passage, if you apologize for your mistakes, you will _______A. feel much better than beforeB. get lots of help from othersC. make the arguments heatedD. win more respect of others28.We can learn from Paragraph 4 that_.A.people are more Iikely to reach an agreement with calmB.it's necessary for friends to argue with each otherC.it's better to deal with an argument very soonD.friends' argument is just like a sports match29.What's the passage mainly about?A.Reason why people argue a lot.B.The results of arguments in our life,C.The importance of conflict in our life.D.Advice on how to deal with disagreements,DEarly in the morning, Feldman would deliver some bagels and a money basket to a company's snack room; he would return before lunch to pick up the money and the left bagels.He had also designed a beautiful economic experiment. By checking the money collectedagainst the bagels taken, he found it possible to tell just how honest his customers were.He considered that a company was honest if over 90% of the people paid. Between 80 and 90% was what he considered to be normal .It was only if a company paid less than 80% that he would feel he had to do something. First he would leave a note, kind of giving them a warning 、 and then, if things didn't improve, he wouId simply stop selling there.So what does the bagel data（数据） tell us? Well, first of all, it shows that smaller offices are more honest than big ones. An office with twenty to thirty employees （雇员） generally pays 3 to 5% more than an office with two hundred employees. This seems to be because in a smaller company people are more worried bout. being dishonest —— probably because they would feel worse if they were caught.The bagel data also suggests that your mood, how you feel, affects （影响） how honest you are .For example, the weather is a really important factor. When the weather is unusually good, more people pay, but if it's unusually cold or rainy. fewer people pay. And people are also affected by public holidays, but in different ways —— it depends on which public holiday. Before Christmas and Thanksgiving, peopie are less honest, but just before the 4th of July and Labour Day they are more honest. This seems to be because holidays like the 4th of July, are just a day off work, and people always look for-ward to them. But Christmas and Thanksgiving are holidays where people often feet quite stressed or unhappy. So their bad mood makes them less honest.The other thing Feldman believes affects how honest people are is the morale in anoffice,When employees like their boss and like their job, then the office is more honest.But in general the story of Feldman's bagel business is a really positive one. It's true that some people do steal from him, hut most people, even though no one is watching them , are honest.30.From the bagel data, we know that ________A.people in big offices are more dishonestB.Feldman didn't like the people in big officesC.Feldman was unsuccessful in his bagel businessD.Fewer people in small offices pay for their bagels31.The underlined word "morale" in Paragraph 6 probably meansA. argumentB. competitionC. spiritD. movement32.According to the bagel data, Feldman had better sell bagelsA. before ChristmasB. before Labour DayC. on Thanksgiving DayD. on a very cold rainy day33.What could be the best title for the passage?A.Start the bagel business.B.Build the bagel company.C.Rich or not? Get the bagel data.D.Honest or not? Take the bagel test.四、任务型阅读-简答（本大题共 1 小题，共 2.0 分）34.Theatre began with the ancient Greeks. They used to have shows called "plays", which tella story by people acting out what happened in it. They had big theatres which were outside,and you could have up to 17.000 people some and watch it. These outside theatres wereround in shape, with stone seats going down to the centre, when they had the "stage". The Romans also built theatres, and there are several you can visit in England, Greece, Italy and Turkey.Greek used to have a person to explain the story to the people who were watching, and the actors used to wear pictures on their faces, some with happy faces, some sad.There were not any theatres in Europe in the Middle Ages, but groups of actors (or players, as they used to be called) travelled around the country putting on shows and singing songs in the towns and in large private houses. Many large houses from this time have a special area in it where the players would do their shows.In England between 1558 and 1603, the ruler was Queen Elizabeth I. During this time,theatres would be built outside the city walls because some people thought they were not safe places to be and that people caused troubles there. They were usually round, and peoplewould stand up to see the show. Rich people had seats to sit on. People used to eatand drink during the show. They used to shout out to the actors and sometimes throwfood at them.In Elizabethan times, a theatre group had 12 men and one writer in it, Women were notallowed to be in the show, so young boys used to wear dresses and play the female roles.Theatre in London today is very popular, even if tickets are very expensive. ManyAmerican stars want to perform in London, and in the last few years Kevin Spacey,Nicole Kidman and Kathleen Turner have all acted in plays in London's theatres.Who began theatre?Where did actors put on shows in the Middle Ages in Europe?Why were theatres built outside the city walls in Elizabethan times?How many people did a theatre group have in Elizabethan times?What_ is the passage mainly about?五、书面表达（本大题共 1 小题，共20.0 分）35.从下面两个题目中任选一题．根据中文和英文提示，完成一篇不少于50 词的文段写作。

2018年北京市石景山区中考物理一模试卷一、单项选择题（下列各小题均有四个选项，其中只有一个选项符合题意．共30分，每小题2分）1．（2分）下列餐具中，通常情况下属于导体的是（）A．玻璃杯B．竹筷C．陶瓷碗D．不锈钢汤匙2．（2分）如图所示的四种现象中，属于光的反射现象的是（）A．我国古代利用日晷计时B．桥在水中形成倒影C．月食的形成D．动物经小孔成倒立的像3．（2分）为了提高全民健身意识，增强国民体质，相关部门在居民区里安装了图2所示的健身器材，下列器材在使用过程中为了减小摩擦的是（）A．划船器座椅上的凸起圆点B．背部按摩器上的凸起圆点C．漫步机上的脚踏滚动圆环D．腿部按摩器上的楞条形花纹4．（2分）语音智能门禁系统能“辨音识人”，这主要是依据声音的（）A．音色B．音调C．响度D．频率5．（2分）如图所示的四个实例中，属于增大压强的是（）A．书包的背带较宽B．运输车装有很多轮子C．滑雪板的面积较大D．安全锤头部做成锥形6．（2分）下列措施中，能使蒸发减慢的是（）A．把盛有酒精的瓶口盖严B．把湿衣服晾在通风向阳处C．用电吹风给湿头发吹风D．将地面上的积水向周围扫开7．（2分）如图所示的工具中，使用时属于费力杠杆的是（）A．天平B．瓶盖起子C．食品夹D．钳子8．（2分）下列事例中，属于用热传递的方式改变物体内能的是（）A．用锯条锯木头，锯条温度升高B．用炉灶烧水，水温升高C．气缸内气体被压缩，温度升高D．用力搓手，手会发热9．（2分）如图所示，下列说法正确的是（）A．物体的长度为 2.2mB．通电螺线管左端为S极C．弹簧测力计的示数为2ND．温度计的读数为43℃10．（2分）关于安全用电，下列做法中正确的是（）A．更换灯泡时先断开电源开关B．在高压线下放风筝C．家用电器电线绝缘皮破损了仍继续使用D．用湿布擦拭正在工作的电视机11．（2分）如图所示电路中，电源电压保持不变，当变阻器滑片P向右移动时，电表示数变大的是（）A ．B ．C ．D ．12．（2分）小明参观了中国科技馆“探索与发现”展厅A 区后，用矿泉水瓶和小玻璃瓶制作了“浮沉子”如图所示。

石景山区2018年初三统一练习化 学 试 卷学校 姓名 准考证号考生须知1．本试卷共6页，共22道小题，满分45分。

考试时间45分钟。

2．请在试卷和答题卡上准确填写学校名称、姓名和准考证号。

3．试题答案一律填涂或书写在答题卡上，选择题、画图题用2B 铅笔作答，其他试题用黑色字迹签字笔作答，在试卷上作答无效。

可能用到的相对原子质量H 1 N 14 O 16 Na 23 S 32 K 39 Ca 40第一部分 选择题（共12分）（每小题只有一个选项符合题意。

每小题1分。

） 1．下列制作蛋糕的原料中，富含蛋白质的是A ．面粉B ．鸡蛋C ．白糖D ．橄榄油 2．下列气体能供给动植物呼吸的是A ．H 2B ．O 2C ．N 2D ．CO 2 3．下列元素中，人体摄入量过低会引起贫血的是 A ．Fe B ．Zn C ．Na D ．Ca 4．下列符号中，表示2个氢分子的是 A ．H 2 B ．2H C ．2H 2 D ．2H 2O 5．铁锅能烹饪食品，说明铁具有良好的A ．导电性B ．延展性C ．导热性D ．抗腐蚀性 6．水晶的主要成分是二氧化硅（SiO 2），SiO 2中硅元素的化合价为 A ．﹣4 B ．﹣2C ．﹢2D ．﹢47．下列实验操作中，正确的是A．滴加液体B ．过滤C ．取用粉末药品D ．点燃酒精灯8．下列不属于．．．二氧化碳用途的是 A ．用作燃料 B ．制碳酸饮料 C ．用于灭火 D ．植物的光合作用 9．下列金属中，不能．．从CuSO 4溶液中置换出Cu 的是 A ．FeB ．ZnC ．MgD ．Ag 10．下列物质露置于空气中，一段时间后，质量减小的是A ．浓盐酸B ．浓硫酸C ．氢氧化钠D ．碳酸钙 11．甲和乙在点燃条件下生成丙和丁，结合微观示意图分析，下列结论不正确．．．的是A ．1个甲分子由5个原子构成B ．生成丙和丁的分子个数比为1:2甲 乙 丙 丁 ++氢原子碳原子 氧原子点燃C ．该化学反应前后，原子种类保持不变D ．丁物质中氢和氧元素质量比为2:1 12．右图是a 、b 两种固体物质的溶解度曲线。