教育最新四川省成都外国语学校2018_2019学年九年级化学上学期期中试题2018112831
四川省成都外国语学校2018-2019学年九年级化学上学期期中试题注意事项:1、本试卷分为第I卷(选择题)和第II卷(非选择题)两部分2、本堂考试60分钟,满分100分3、答题前,考生务必先将自己的姓名、学号填写在答题卡上,并使用2B铅笔填涂第Ⅰ卷(选择题共52分)一.选择题(本大题共19个小题,1-14题每小题3分,15-19题每小题2分,共52分)1.下列成语所描述的变化属于化学变化的是()A.汽油挥发 B.冰雪融化 C.纸张燃烧 D.粉笔折断2.下列符号中,同时表示一种单质、一种原子和一种元素的是 ( )A.O2 B.2H C.N D.Fe3. 河水净化的主要步骤如图所示,有关说法错误的是()A.步骤Ⅰ可除去难溶性杂质 B.试剂M可以是活性炭C.步骤Ⅲ属于物理变化 D.净化后的水仍是混合物4.“探月”目的之一是获取核聚变燃料He-3。
He-3原子核里有2个质子,1个中子相对原子质量为3。
下列表示He-3 原子的结构示意图中,正确的是()5.某学生设计了六种制取氧气时使用药品的方案,其中可以快速制得氧气的是()①将氯酸钾单独加热,②用氯酸钾和二氧化锰混合加热,③将高锰酸钾单独加热,④用高锰酸钾和氯酸钾混合加热,⑤常温下将过氧化氢和二氧化锰混合,⑥分离液态空气法。
A.①②③④⑤ B.②③④⑤ C.②③④⑤⑥ D.全部6.试管在化学实验中常与其他仪器和药品同时使用(图中其他仪器和药品略去)。
如下图试管的朝向与实验项目相对应且正确的是()A.实验室加热固体 B.向试管中加入粉末状药品的初始阶段C.排空气法收集氧气 D.给液体加热7.化学实验中常用到木条,下列实验中木条的使用不能达到目的是()A. 用带火星的木条检验氧气B.用燃着的木条区别氮气和二氧化碳C.用燃着的木条证明不同气体中的氧气含量不同D.用小木条比较酒精灯火焰各层的温度8.下列有关原子的说法正确的是()A.原子能构成分子,但不能直接构成物质B.原子在化学变化中不能再分,只能重新组合C.C-12原子和C-13原子的中子数相同D.原子中一定含有质子、中子、电子三种粒子9.根据图的信息判断,下列说法正确的是( )A.硫属于金属元素B.硫原子的相对原子质量为32.07gC.在化学反应中,硫原子容易失去电子,形成S2-D.硫原子的核电荷数为1610.下列说法不正确的是()A.电解水可以得到氧气,是因为水中含有溶解的氧气B.电解水要消耗大量的电能,可以寻找更好的方法使水分解C.电解水时生成氢气和氧气的体积比约为2:1D.任意排放工业废水和生活污水、滥用化肥和农药都会导致水体污染11.某同学对SO2、NO2、O3和CO四种空气污染物的认识,不正确的是( ) A.O3属于单质 B.SO2、NO2和CO都属于氧化物C.SO2、NO2中都含有氧分子 D.SO2、NO2、O3和CO中都含有氧元素12. 利用四氧化三钴纳米棒作催化剂,可将汽车尾气中的CO在低温下转化为CO2。
下列关于该反应的说法中,正确的是()A. 反应物和生成物都是化合物,该反应属于化合反应B. 反应前后四氧化三钴纳米棒的化学性质发生了变化C. 可有效降低汽车尾气对大气的污染D. 反应前后氧原子数目发生了变化13. 右图是水分子在一定条件下分解的示意图,从图中获得的信息不正确的是 ( )A.一个水分子由两个氢原子和一个氧原子构成B.水电解后生成氢气和氧气的分子个数比为2:1C.水分解过程中,分子的种类不变D. 水分解过程中,原子的数目不变14.下列观点正确的是()A.元素周期律的发现,奠定近代化学的基础 B.改变物质的性质一定要通过化学变化C.在化学变化中原子的电子数不会发生变化 D.通过化学变化一定能改变物质的性质15.三种元素的粒子X m-、Y n+、Z p+都有相同的电子层结构,已知p>n,则它们的核内质子数(依次用X、Y、Z表示)关系为 ( )A.X=Y=Z B.Y>Z>X C.X>Z>Y D.Z>Y>X16.类推是化学学习中常用的思雄方法.下列类推不正确的是()A.离子是带电的粒子,但是带电的粒子不一定是离子B.氧化物中一定含有氧元素,但含有氧元素的化合物不一定是氧化物C.单质是由同种元素组成的纯净物.所以同种元素组成的纯净物一定是单质D.同种元素的粒子其质子数相同,所以质子数相同的粒子一定属于同种元素17.一位学生要用托盘天平称量8.5g药品,在称量中发现指针向左偏转。
这时他应该( ) A.向右盘中加砝码 B.减少药品 C.移动游码 D.增加药品18.下面是某化学兴趣小组的同学设计的四组实验装置,在两两对比实验中,下列观察(或测定)方法最难以比较样品对过氧化氢分解加速效果的是()A. 第一组同时实验,观察比较反应过程中两个气球体积的变化情况B. 第二组同时实验,观察比较反应过程中两者产生气泡的快慢C. 第三组分两次实验,看带火星的木条是否能复燃D. 第四组分两次实验,比较反应过程中收集一定体积的气体所需要的时间19.下列图象能正确反映对应变化关系的是()A.测定空气中氧气的含量 B.往一定质量的二氧化锰中加入双氧水C.将水通直流电一段时间 D.用等质量、等浓度的双氧水制取氧气第Ⅱ卷(非选择题共48分)二.填空题(本大题共3个小题,每空1分,共21分)20. (9分)(1)写出下列划线处“2”的意义。
2H________;H2O__________________ (2)用化学用语表示下列物质:地壳中含量最多的非金属元素:________,氩气_______;铵根离子_______,三个铝离子__________,氯离子的结构示意图:_______(3)某元素原子失去2个电子后形成的粒子与Ne有相同的核外电子数,下列说法正确的是()A.该元素位于周期表第二周期B.该粒子为阴离子C.该粒子核电荷数为10 D.该粒子为Mg2+(4) 用微粒的观点解释下列现象或事实,不合理的是()A.酒精挥发﹣﹣分子大小发生改变B.加热高锰酸钾制氧气﹣﹣分子本身发生了改变C.酒精和水混合后的体积小于二者体积之和﹣﹣分子之间有间隔D.水和过氧化氢化学性质不同﹣﹣构成分子不同21.(8分)根据如图所示实验,回答下列问题.(1)图C用_______________夹取一小块木炭放在酒精灯火焰的部分迅速烧红。
证明木炭燃烧生成了二氧化碳的现象是__________________________________________。
(2)图A中反应的化学符号表达式为 __________ ;若将氧气换成空气,则该化学反应(填“能”或“不能”)进行。
(3)图B中红磷反应的符号表达式为_______________________。
22. (4分) 用如图装置进行水的电解实验.⑴开始反应前a,b两管内都充满液体。
关闭活塞,接通电源,一段时间后,两管产生的气体如图所示,则a管下方导线应接电源的(填“正”或“负”)极。
用 __ 验证b管中的气体。
(2)电解水实验之前在水中加入少了稀硫酸的作用____________。
(3)通过这个实验得到的结论是:。
三、推断题(共2小题,共 11分)23.(7分)小刚收集到一瓶浑浊的河水,他要模拟自来水厂的净水过程,其实验过程如下所示,请回答以下问题:(1)请你根据所学知识帮小刚完善流程中的步骤或者所需药品:步骤1为_________,加入药品2的目的是_____________________。
(2)小刚可用来检验液体D是硬水还是软水,在实验室中常用____________的方法降低水的硬度。
(3)下列关于水的说法中,不正确...的有:(填序号)。
①水是由氢元素和氧元素组成的化合物②清澈、透明的泉水是纯净物③合理施用农药、化肥,以减少水体污染④将活性炭放入硬水中可使其软化⑤洗菜、洗衣后的水用来浇花、冲洗厕所(4)洪涝地区的灾民用下列几个步骤将河水转化为可饮用水。
①化学沉降(用明矾)②消毒杀菌(用漂白粉)③自然沉降④加热煮沸。
以上处理过程顺序合理的是 ( ) A.③②①④ B.③①②④ C.③①④② D.①③④②(5)关于过滤下列叙述中,不正确的是()。
A. 滤纸的边缘低于漏斗B. 玻璃棒靠在三层滤纸一边C. 过滤可以除去水中不溶性杂质,过滤时液面要高于滤纸的边缘D. 漏斗下端的管口应置于烧杯的中间E. 可以用过滤的方法来分离二氧化锰和食盐24.(4分) 构建知识网络是一种重要的学习方法,如图是某同学构建的有关氧气获得和性质的网络图。
请根据图回答有关问题:(1)电解水是实现转化①的途径之一,请写出该反应的符号表达式:___________;基本反应类型属于________________。
(2)氧气和二氧化碳的相互转化的方法很多,在自然界中,⑤的主要途径是绿色植物的_________作用。
四.实验题(共2小题,共16分)25. (9分)如图所示为实验室中常见的气体制备和收集装置,请回答下列问题:(1)实验室制取氧气利用发生装置A,发生化学反应的符号表达式为_____________,二氧化锰是该反应的催化剂,则二氧化锰的质量和__________在反应前后没有发生变化,若用装置D收集的氧气,将带火星的木条伸到瓶口,瓶中,瓶底都没有复燃,你认为原因可能是(写一条)___________________________。
(2)某班同学用15%的过氧化氢溶液和二氧化锰制氧气,并选用C作发生装置, 该反应的符号表达式为____________________________,实验过程中发现反应速率过快,不能得到平稳的氧气流。
对C装置如何改进可以减缓反应速率____________(更换实验仪器)。
(3)实验室用无水醋酸钠(固体)和碱石灰(固体)混合加热制取甲烷,甲烷的密度比空气小、难溶于水,制取甲烷所需的发生装置为(填序号)若用上图E排空气法收集甲烷,则甲烷导入端为(选填“a”或“b”)。
26.(7分)I、某实验小组利用图3所示装置测定空气中氧气体积分数并取得成功.【查阅资料】白磷燃烧所需的最低温度(也叫着火点)为40℃.【实验准备】锥形瓶内空气体积为 250mL,注射器中水的体积为 60mL,该装置气密性良好.【实验探究】装入药品,按如图所示连接好仪器,夹紧弹簧夹.先将锥形瓶底部放入热水中,白磷很快被引燃,然后将锥形瓶从热水中取出.【现象分析】(1)将锥形瓶底部放入热水中,白磷被引燃,白磷燃烧时产生大量白烟,并放出热量;(2)在整个实验过程中,可观察到气球的变化是(填字母)A.变小 B 变大 C.先变小后变大 D 先变大后变瘪(3)待白磷熄灭,锥形瓶冷却到室温后,打开弹簧夹,还可观察到的现象是:①注射器中的水自动喷射出来;②当注射器中的水还剩约 ______ 时停止下流.【得出结论】 _____________________ .II.某兴趣小组计划对空气成分进行探究,以下是他们的实验设计方案:(1)除去二氧化碳和水蒸气:图 1 中装置 B 的作用是,装置 A、B 顺序能否颠倒(填“能”或“否”)。
四川省成都外国语学校学年八年级上学期期中考试英语试卷
成都外国语学校2017-2018学年度上期初二半期考试英语试卷考试时间:听力30分钟+笔试120分钟Part A 80 scoresListening Test30 scoresⅠ. Listen to each sentence carefully and choose the correct response. Each sentence will be read only once.10 scores1. A. Germany B. PortugalC. SpanishD. Brazil2. A. The camera B. The saxophoneC. The video cassetteD. The computer3. A. In a theatre B. In a bankC. In a post officeD. In a restaurant4. A. It’s half an hour by car. B. It’s sixty pounds.C. It’s six o’clock.D. It’s very comfortable.5. A. Hello; do you want to play football nowB. Hello; where are youC. Hello; this is Tina.D. Hello; are you Maria6. A. She is married. B. She is from Portugal.C. She is a teacher.D. She is my classmate.7. A. Thank you. B. I’m an artist now.C.How about this afternoonD. I’m sorry to hear that.8. A. I’d like to have a rest now.B. I’d like some tea.C. I’d like some potatoes.D. I’d like to buy some cheese.9. A. It is Japanese.B.It is from Spain.C.It is a pizza.D.It is made of rice; potatoes and beef.10. A. Cheese.B.Thank you.C.What are you going to have todayD.You are so nice.II. Listen to the dialogues carefully and choose the correct answers. Each dialogue will be read twice.5 scores11. A. Tomatoes B. PotatoesC. Apple juiceD. A chicken sandwich.12. A. At five to nine. B. At twenty to nine.C.At five past ten.D. At five past nine.13. A. He is a marketing manager. B. He is an account manager.C. He is a doctor.D. He is a nurse.14. A. Onions; beef; lettuce; pepper and tomatoes.B. Onions; potatoes; pepper; lettuce and beef.C. Onions; tomatoes; pepper; carrots and beef.D. Onions; tomatoes; lettuce; beef and cheese.15. A. They’re green. B. They’re red.C. They’re blue.D. They’re black.III.Listen to the conversation carefully and choose the correct answers. The conversation will be read twice. 5 scores16.Where is Jenny nowA.In Beijing.B.In Xi’an.C.In Xinjiang.D.In Chengdu.17. Who is Jenny withA.Her mother.B.Her father.C.Her uncle.D.Her classmates.18. What is the weather like in XinjiangA. Sunny and foggy.B. Cold; dry and warm.C.Cold and windy.D.Rainy and windy.19. What is Jenny’s father going to doA.To phone Jenny’s mother.B.To have some grapes.C. To climb mountains.D.To visit beautiful places.20. Where does Jenny’s father want to goA. Beijing.B.Qingdao.C.The Blue Mountains.D.Britain.IV.Listen to the passage carefully and judge if it’s true or false. If it’s true;please write A. If it’s false;please write B. The passage will be read twice. 5 scores21. A man is standing by the road and eating an apple.22. The policeman and the man are both fat.23. The policeman can’t catch the man.24. The man is a bad man.25. The policeman runs after the man again because he wants to get thinner.V.Listen to the passage and choose the correct answers. The passage will be read three times.5 scores26. What is this message mainly aboutA.Some team players.B.A sports TV program.C.A basketball club.D.Two friends.27. How often do the members meetA.Once a week.B.Twice a week.C.Three times a week.D.Once a month.28. When are there sometimes matches for the team playersA.On Wednesday afternoon.B.On Saturday afternoon.C. On Friday evening.D. On Sunday morning.29. What should the player take to the hallA.A map.B.A watch.C.A ball.D.A coat.30. How much rent do the players spend on it each weekA.$10.B.$12.C.$14.D.$15.Written Test 50 scoresI. Multiple choice. 25’31.The company offers accommodation to all the people working for it.A. food and drinkB. places to live inC. food to eatD. main courses32.Lisa is a student of English.A. a student who likes EnglandB. a student who comes from EnglandC. a student who is interested in EnglishD. a student who studies English as her main job33.Actually; the delicious cakes are not made by myself. They’re from my friend.A. For factB. As we knowC. In factD. As matter of fact34.Excuse me. Can you say the question again; pleaseA. repeat the question againB. repeat the questionC. answer the question againD. pardon35.Peter thinks his new school has usual facilities; but the teachers there are fantastic.A. boringB. greatC. busyD. funny36.Thank you for_______me ______my math homework.A. helping; withB. help; toC. help; withD. helping; /37.The multimedia systems in classrooms are only available _______ the teachers in our school.A. onB. toC. withD. by38.It’s becoming more and more difficult to find _______; so people have to try very _______.A. a work; hardB. a job; hardlyC. work; hardlyD. jobs; hard39._______ name is Steven. _______ a baker and _______ job is to bake cakes and bread.A. His; He’s; hisB. He’s; His; he’sC. His; He’s; he’sD. He’s; He’s; his40.Those are ____________bedrooms. The bedrooms are just next to each other.A. Lily and Liz’sB. Lily’s and LizC. Lily’s and Liz’sD. Lily and Liz41._______ are asked to do our math homework again because we all did a terrible jobyesterday.A. Billy; you and IB. I; Billy and youC. You; I and BillyD. You; Billy and I42.A: Whose is this dirty old bookB: It _______ mine. My books are always neat and tidy.A: Oh It _______ Billy’s. Look There’s his name on the cover.A. can’t be; may beB. must be; may beC. may be; can beD. can’t be; must be43.There is _______ “u” and _______ “i” in the word “community”.A. an; anB. an; aC. a; anD. a; a44.My parents will take me to a famous place like ______ if I do well in the coming exam.A. Mount FujiB. the Big BenC. Eiffel TowerD. Great Wall45.Marco wants to rent an apartment _______; but he doesn’t like the one with _______.A. to live in; few furnitureB. to live in it; a lot of furnitureC. to live in it; much furnitureD. to live in; little furniture46.After work; many of the parents wait ____________ at the school gate every day.A. for their children to come outB. their children come outC. for their children come outD. their children to come out47.Because of the _______ policy 政策in China; a lot of families want to have _______ child.A. two-child; the otherB. two-children; anotherC. two-child; anotherD. two-children; other48.The flight provides the passengers in the first-class coach _______ delicious meals; snacksand comfortable beds.A. forB. withC. toD. /49.Look _______ stars _______ shining in the dark sky. That’s so beautifulA. A number of; isB. The number of; isC. The number of; areD. A number of; are50.Tiffany goes to a fitness center _______ to keep fit; while her roommate Cindy enjoysplaying the piano _______.A. at her leisure; in her leisure timeB. in her leisure time; in her leisureC. in her leisure; at her leisure timeD. at her leisure; at her leisure time51.Mr. Harris looks _______ today. He’s looking _______ at every student in his class; even thenaughty boys.A. happily; happyB. unhappy; happilyC. happy; unhappilyD. happy; happily52.It’s quite cold in the room. I’d like _________ to drink. I don’t want to get a cold.A. some hot thingB. hot somethingC. something coldD. something hot53.Banks are open from 9 in the morning to 5 in the afternoon _______ weekdays; but _______weekends they are open only in the mornings.A. at; inB. for; inC. on; atD. in; on54.If you are _______ all the time; you don’t have to go to bed late to _______ the exams.A. well-prepared; prepare forB. good-prepared; prepare forB. badly-prepared; prepare D. well-prepared; prepare55._____ more information; passengers can contact the air company _____ 0273 330016.A. With; byB. As; withC. By; atD. For; onⅡ. Cloze test. Fill in the blanks w ith the best choices to complete the passages. 10’What is American food You may think the answer is as easy as pie. To many people; American food means ___56____; hot dogs; fried chicken and pizza. If you have a “___57____ tooth”; you may think of apple p ies or chocolate cakes. But are these the only kind of food in AmericaExcept for Thanksgiving turkey; it’s hard to find a typical “American” food. The UnitedStates is a land of immigrants 移民. When people moved to America; they brought their ___58____ st yles with them. That’s why you can find food from all over the world in America. In some ways; Americans have taken foods from other ___59____as their favorites. They love ___60____ pizzas; Mexican Tacos and Chinese egg rolls.Americans are living a busy life today. Half-done dinners and fast food make cooking at home very ___61____. They also eat a lot of unhealthy “junk food” like potato chips; candy bars; fried chicken and so on. ___62____ other people prefer healthier eating habits. Some even go “all ___63____”. They don’t eat any food prepared with chemicals化学成分.American culture is a good example of the saying; “You’re ___64____you eat.” Different kinds of foods enjoyed in the US ___65____different personal tastes. However; no matter the food is from abroad or home; fast or not fast; unhealthy or natural; the style is all-American.56. A. sushi B. pasta C. noodles D. hamburgers57. A. salty B. sweet C. spicy D. sour58. A. cooking B. drinking C. singing D. living59. A. cities B. towns C. streets D. countries60. A. French B. English C. German D. Italian61. A. easy B. difficult C. strange D. special62. A. So B. Or C. And D. But63. A. nasty B. natural C. delicious D. unhealthy64. A. who B. that C. what D. which65. A. show B. have C. give D. includeIII. Reading Comprehension. 15’AA. get a movie ticket freeB. get some stamps freeC. get five hours of free parkingD. get 15% off when parking67. Buy one T-shirt at Fashion Menswear; you may get one ______ free.A. T-shirt of the same priceB. coat of a higher priceC. shirt of the same priceD. T-shirt of the same kind68. You can get a 15% discount on any books if you ______ at Maze Book Store.A.buy five children’s books B.buy some giftsC.show this coupon D.buy two novels69. If you want to have a free soft drink; you can go to __________.A.Maze Book Store B.Judy’s CaféC.Fashion Menswear D.the cinema70. If John spends 10 dollars on a full-price movie ticket on Tuesday; he can buy a second ticket for only _______.A.15 dollars B.10 dollars C.8 dollars D.5 dollarsBA man works on my farmhouse. One day; after a day’s work; his old truck doesn’t work. When I drive him home; he sits quietly.When we get to his house he asks me to come in to meet his family. When we walk to the front door; he stops at a small tree and touches the branches 树枝with both hands. When he is opening the door; he has a quite different look. He smiles and hugs his two small children and gives his wife a kiss.Later; he walks me to the car. When we pass the tree; I ask him about what he does at the little tree.“Oh; that’s my trouble tree;” he says.“I know I can’t help having troubles on the job; but those troubles aren’t for the house or for my wife and the children. So I put them down to the tree every night when I come home. Then; in the morning; I pick them up again.”“Funny thing is;” he smiles; “when I come out in the morning to pick up those problems; there aren’t as many as I remember putting down the night before.”71. The writer drives the man home because ___________.A. the man can not drive a truck at allB. the man asks the writer to his houseC. there is something wrong with the man’s truckD. the man works hard on the writer’s farmhouse72. What does the underlined word “them” meanA. Troubles.B. Branches.C. Children.D. Trees.73. What does the man do at the front doorA. He plants a a small tree.B. He puts his bag under the branches.C. He touches the small tree’s branches.D. He speaks to a small tree74. When the man goes to the tree the next morning; he usually ____________.A. takes some branches from the treeB. feels better than the night beforeC. starts to feel bad about his workD. talks to the tree for a while75. What can we learn from the storyA. Small trees help you with big problems.B. Don’t be unhappy when you’re in trouble.C. There aren’t any real problems in life.D. Don’t bring work trouble hom e to your family.CIt is quite strange that when you walk into a store; but you see no shop assistants inside. You pick up things and get ready to wait in line and pay. But it’s also odd that there’s no shopkeeper waiting for you to check out 结账. So what has happened to this storeWell; you may have come into Tao Café; a cashless store designed by Alibaba. The store sells drinks; fast food and snacks. 50 shoppers can go shopping in the store at a time. To get in and shop; people only need a smartphone with a Taobao app and an Alipay account.By scanning 扫描their Taobao QR code 二维码; shoppers can get into the store. The store has also got the information of all things and their places on the shelves. So when shoppers pick up the things they want; the store it self will can “watch” and “remember” their choice.When shoppers are ready to leave; they don’t wait in line to pay. Instead; they go through two checkout doors. Then the bills will soon be paid with a Taobao account through Alipay.According to Alibaba; the checkout machines can recognize 识别things of the store even when shoppers put them in pockets or bags. So it is almost impossible to take things away from the store without paying.76. The underlined word “odd” in the first paragraph probably means “_______”.A. interestingB. strangeC. usualD. different77. Tao Café is known as _____.A. a coffee shopB. a cashless storeC. an online storeD. a Taobao Maker Festival78. To buy things from Tao Café; you don’t need 需要________.A. a smartphoneB. a Taobao appC. an Alipay accountD. a WeChat QR code79. What is Paragraph 3 mainly aboutA. How to check out in Tao Café.B. Why Tao Café needs cameras.C. How Tao Café works.D. How shoppers find things easily in Tao Café.80. What can we know from the articleA. The old people would enjoy shopping in Tao Café.B. Lots of things will be lost in the cashless store.C. Tao Café will be the only place to shop.D. It saves people much time to shop at Tao Café.Part B 70 scoresI. Fill in the blanks according to the correct forms of the given words. 15’1.The dishes in that restaurant are tasty but the prices are quite ___1___ reason. I don’t thinkI’ll go there again.2.On New Year’s Day; people often hold different activities to welcome the ___2___ arrive ofthe new year.3.The book ___3___ call Harry Potter is her favorite.4.He’s so good at fixing the electrical equipment that his neighbours all think him an___4___electricity; but actually he’s an artist.5.Would you like ___5___ travel with us to south Africa this winter vacation6.The quick development of smart phones and APP makes it easier for people to learn about___6___ photograph; the art of taking photos.7.I have a few hobbies;______7_______include swimming and playing the guitar.8.As a businesswoman; she often ___8___ fly to other countries.9.Our teachers spend most of their break time at the office ___9___ check our exercise-books.10.Will you study ___10___ as your second foreign language Spain11.With these soft cushions; the old man sits ___11___ in the armchair. comfortable12.At the moment; the twin sisters ___12___ each other tightly after being away for years. hug13.To have her own life; the famous actress never talks about her ___13___ status. marry14.As ___14___ from China; we should behave well when we travel to a foreign country. visit15.It’s important for you ___15___ your passport with you when travelling abroad. takeII. Pattern shift. 10’16.Women less than 20 years old can’t get married in law in China.= Women _______ 20 years old can’t get married in law in China.17.Flight AF402 is going to take off immediately.= Flight AF402_________ __________ ___________take off.18.How much are the cassettes=_______ _______ _______ _______ the cassettes19.His passport is in his handbag; _______ _______ Ask a tag question.20.Alan’s got some posters to take when he moves to a new house. Change it into a negativesentence.21-25: Raise a question to the underlined part.21.It’s about half an hour by subway from my school to the city centre.22.The boy earns pocket money by washing dishes after meals at home.23.There are three loaves of bread on the bread board.24.The games room with a billiard table is on the ground floor.25.Frank enjoys talking with customers at his shop.III. Find the only mistake in each line and correct them. 5’This is Anna’s bedroom. It’s not vey big; and it’s 26. _______________very bright and clean. Anna tidy her room every day. 27. _______________There is a table opposite the door and on the table is 28. _______________some beautiful flowers and useful books. As you see;there’s also a big picture for Anna on the wall. She’s 29. _______________smiling sweetly in it. Over a picture is a round clock. 30. _______________Anna likes her bedroom very much.IV. Fill in the blanks according to the texts and the first letters given. 20’In our new English book Look Ahead; we meet different people in Britain.●James is from I____31____. He is in London to start a new job with MAP A____32____.Tom Hall is his boss and Rita is Tom’s s____33____; while Julia is an account m____34____ like James. They are all very f____35____ to him. But he’s got some problems with his hotelb ecause there isn’t a car park for his car. And there are no s____36____ facilities. He wantsto live in his own f____37_____.●Maria; however; enjoys living in Eldon House. It’s a hostel for i____38____ students; whichis only ten m____39____ walk from the station in central Brighton. Maria lives in a big bedroom. It hasn’t got a p____40____ bathroom; but there’s one opposite her room. It’s close and convenient.●Graziella from S___41___; is also a student of English like Maria. But she lives with the Gayfamily as a g___42___. Pauline and Sean Gay are m___43___ with two d___44___ called Hannah and Ella.●If you want to have a t___45___ of Italian food in the U.S.; Frank MacKondy’s t___46___food shop is a good choice. It sells h___47___ Italian food and all kinds of sandwiches;which can all be s___48___ hot or cold. And the s___49___ in his shop is the party sandwich which is big e___50___ for thirty people.V. Choose 10 from the 12 words in the box to complete the passage with their proper forms.Mrs. Brown is very fat. “Don’t eat meat____51____”;her doctor says to her. “I ____52___her eating them; doctor.”Her husband says.The next morning; Mrs. Brown___53____a nice cake for Mr. Brown; and her husband eats ___54___of it . After he goes out ;Mrs. Brown cuts a very small ___55___of the cake and eats it . It is very good . Then she cuts a bigger piece and eats it __56____. In a few minutes she finishes the cake.“My husband is going to be very___57____.”she says.“What am I going to do ”She makes another cake very quickly; eats half of that; and ____58___half on the ___59____ . Her husband comes back later .He sees the half of the cake on the table and he is very ___60 ____.VI. Writing. 10’As Thanks-giving Day 感恩节is arriving; do you have anyone you want to say “thanks”to Now write a composition with 100 to 120 words about Thanks-giving Day. The following points should be included.1. A title.2. What do you know about Thanks-giving Day3. Who do you want to thank on this year’s Thanks-giving Day and why Give at least tworeasons.4. How are you going to show your thanks Write at least two ways.5. What do you think of your plan 计划for this Thanks-giving Day成都外国语学校17-18学年上初二期中英语考试答案Part A 80’听力:1-5 CBDAC 6-10 CDBCA 11-15 BACAB 16-20:CDBCC 21-25:BABBA 26-30:CADDB笔试:I. Multiple C hoice. 25’31-35 BDCBB 36-40 ABDAC 41-45 DDCAD46-50 ACBDA 51-55 DDCADII. Cloze. 10’56-60 DBADD 61-65 ADBCAIII. Reading Comprehension. 15’66-70 CACBD 71-75 CACBD 76-80 BBDCDPart B 70’I. Fill in the blanks according to the correct forms of the given words. 15’1.unreasonable2. arrival3. called4. electrician5. to travel6.photography7. including 8. flies 9. checking10. Spanish 11fortably 12. are hugging13. marital 14. visitors 15. to takeII. Pattern shift. 10’16.under17.is about to18.What’s the price of19.isn’t it20.Alan hasn’t got any posters to take when he moves to a new house.21.How far is it from your school to the city centre/center22.How does the boy earn pocket money at home23.How much bread is there on the bread board24.On which floor is the games room with a billiard table / Which floor is the games room witha billiard table on25.What does Frank enjoy doing at his shopIII. Find the only mistake in each line and correct them. 5’26.and---but 27. tidy---tidies 28. is---are 29. for---of 30. a picture---thepictureIV. Fill in the blanks according to the texts and the first letters given. 20’31. Ireland 32. Advertising 33. secretary 34. manager35. friendly 36. sports 37. flat 38. international39. minutes’40. private 41. Switzerland 42. guest43. married 44. daughters 45. taste 46. takeaway47. homemade 48. served 49. speciality 50. enough V. Choose 10 from the 12 words in the box to complete the passage with their proper forms. Each word can be used only once. 10’51.again 52.will stop 53.makes 54.half55.piece 56.quickly 57.angry 58.leaves59.table 60.happyVI.. Writing. 10’As Thanks-giving Day is arriving; do you have anyone you want to say “thanks” to Nowwrite a composition with 100 to 120 words about the Thanks-giving Day. The following pointsshould be included.1. A title. 1’2. What do you know about Thanks-giving Day 1’3. Who do you want to thank on this year’s Thanks-giving Day and why Give at least tworeasons. 3’4. How are you going to show your thanks Write at least two ways. 2’5. What do you think of your plan for this Thanks-giving Day 1’结构及用词:1’卷面及字迹:1’。
四川省成都市实验外国语学校(温江校区)2022-2023学年九年级上学期期中化学试题
C.锗原子质量为72.63D.锗原子的核内电子数为32
8.下列化学用语所表达的意义正确的是
A.Fe2+:1个铁离子B.2 :2个碳酸根离子
C.4N2:4个氮分子D.C60:60个碳原子
9.在宏观、微观和符号之间建立联系是化学学科的特点。2022年2月4日北京冬奥会开幕式火炬燃料是氢气,以天然气(主要成分是 )为原料制备氢气的微观示意图如图所示。下列说法错误的是
A.甲醛中含有水分子
B.甲醛分子中含有碳元素
C.甲醛由碳元素、氢元素、氧元素组成
D.甲醛由碳原子、氢原子、氧原子构成
12.关于自然界中的“氧循环”下列说法正确的是
A.“氧循环”指的是氧气的循环,多是物理变化
B.自然界中产生氧气的途径主要是植物的光合作用
C.物质在空气中的缓慢氧化释放氧气
D.大气中各成分含量相对稳定,与自然界中的“氧循环”没有关系
A.反应中反应物的分子个数比为
B.反应前后分子的种类和个数都没有发生改变
C..反应前后原子的种类没有发生变化
D.在化学反应中分子可分为原子,原子不能再分
10.建立模型是学习化学 重要方法。下列化学模型中正确的是
A.反应类型关系模型
B.空气成分模型
C.物质分类关系模型
D.地壳中元素含量
11.甲醛(化学式为CH2O)是室内装潢可能产生的污染物之一。下列说法正确的是
选项
需区分物质
方法一
方法二
A
空气和氧气
用带火星的木条检验
闻气味
B
二氧化碳和氮气
倒入澄清石灰水
伸入燃着木条
C
过氧化氢溶液和水
伸入带火星的木条
四川省成都外国语学校2024-2025学年高二上学期期中考试数学试卷
四川省成都外国语学校2024-2025学年高二上学期期中考试数学试卷一、单选题1.已知两条直线1:3210l x y -+=和2:210l ax y ++=相互垂直,则a =()A .2B .3C .43D .43-2.我市某所高中每天至少用一个小时学习数学的学生共有1200人,其中一、二、三年级的人数比为3:4:3,要用分层随机抽样的方法从中抽取一个容量为120的样本,则应抽取的一年级学生的人数为()A .52B .48C .36D .243.若方程22230x y mx y ++-+=表示圆,则m 的取值范围是()A .(,-∞B .((),-∞-⋃+∞C .(,-∞D .((),-∞-⋃+∞4.学校组织知识竞赛,某班8名学生的成绩(单位:分)分别是65,60,75,78,86,84,90,94,则这8名学生成绩的75%分位数是()A .88分B .84分C .85分D .90分5.无论λ为何值,直线()()()234210x y λλλ++++-=过定点()A .()2,2-B .()2,2--C .()1,1--D .()1,1-6.在一个袋子中装有分别标注1,2,3,4,5,6的6个小球,这些小球除标注的数字外完全相同,现从中随机取出2个小球,则取出标注的数字之差的绝对值为2或4的小球的概率是()A .110B .310C .25D .147.如图,平行六面体1111ABCD A B C D -的底面ABCD 是矩形,其中6AB =,14,2AD AA ==,且1160A AD A AB ∠=∠=︒,则线段1AC 的长为()A .9B .C .D .68.已知点(),P x y 在直线280x y -+=的最小值为()A .4B .6C .8D .10二、多选题9.下列说法正确的是()A .不经过原点的直线都可以表示为1x y a b+=B .若直线与两坐标轴交点分别为A 、B ,且AB 的中点为()4,1,则直线l 的方程为182x y +=C .过点()1,1且在两坐标轴上截距的绝对值相等的直线方程为y x =或2x y +=D .直线324x y -=的截距式方程为1423+=-x y 10.一只不透明的口袋内装有9张相同的卡片,上面分别标有19 这9个数字(每张卡片上标1个数),“从中任意抽取1张卡片,卡片上的数字为2或5或8”记为事件A ,“从中任意抽取1张卡片,卡片上的数字不超过6”记为事件B ,“从中任意抽取1张卡片,卡片上的数字大于等于7”记为事件C .则下列说法正确的是()A .事件A 与事件C 是互斥事件B .事件B 与事件C 是对立事件C .事件A 与事件B 相互独立D .()()()P A B P A P B =+ 11.如图,棱长为2的正方体1111ABCD A B C D -的内切球为球O ,E ,F 分别是棱AD ,1BB 的中点,G 在棱AB 上移动,则下列选项正确的是()A .该内切球的球面面积为4πB .存在点G ,使得//OD 平面EFGC .平面EFC 被球O 截得的截面圆的面积为4π7D .当G 为AB 的中点时,过E ,F ,G 的平面截该正方体所得截面的面积为三、填空题12.圆心为()1,2-,半径为5的圆的方程为.13.经过()()0,2,1,0A B -两点的直线的方向向量为()1,k ,求k 的值为.14.若恰有三组不全为0的实数对(,)a b 满足关系式|3||533|a b a b ++=-+=数t 的所有可能取值的和为.四、解答题15.已知空间三点(2,0,2),(1,1,2),(3,0,4)A B C ---,设,a AB b AC == .(1)求a 和b的夹角θ的余弦值;(2)若向量ka b + 与2ka b - 互相垂直,求k 的值.16.已知ABC V 的三个顶点分别是()5,1A ,()7,3B -,()8,2C -.(1)求BC 边上的高所在的直线方程;(2)若直线l 过点A ,且与直线10x y ++=平行,求直线l 的方程;(3)求BC 边上的中线所在的直线方程.17.如图,在棱长为2的正方体1111ABCD A B C D -中,E ,F 分别为棱1DD ,11C D 的中点.(1)求点F 到直线1B A 的距离;(2)求点F 到平面1A BE 的距离.18.某调研机构为了了解人们对“奥运会”相关知识的认知程度,针对本市不同年龄和不同职业的人举办了一次“奥运会”知识竞赛,满分100分(95分及以上为认知程度高),结果认知程度高的有m 人,按年龄分成5组,其中第一组[)20,25,第二组[)25,30,第三组[)30,35,第四组[)35,40,第五组[]40,45,得到如图所示的频率分布直方图.(1)根据频率分布直方图,估计这m 人的平均年龄;(2)现从以上各组中用分层随机抽样的方法选取20人,担任本市的“奥运会”宣传使者.若有甲(年龄36),乙(年龄42)两人已确定入选,现计划从第四组和第五组被抽到的使者中,再随机抽取2名作为组长,求甲、乙两人至少有一人被选上的概率;(3)若第四组宣传使者的年龄的平均数与方差分别为36和2,第五组宣传使者的年龄的平均数与方差分别为42和1,据此估计这m 人中35~45岁所有人的年龄的方差.19.如图所示,直角梯形ABCD 中,//,,22AD BC AD AB AB BC AD ⊥===,四边形EDCF为矩形,CF EDCF ⊥平面ABCD .DF平面ABE;(2)求平面ABE与平面EFB夹角的余弦值;(3)在线段DF上是否存在点P,使得直线BP与平面ABE所成角的余弦值为13,若存在,4求出线段BP的长度,若不存在,请说明理由.。
四川省成都外国语学校2020-2021学年高一上学期期中考试数学试题 Word版含答案
成都外国语学校2020一2021学年度上期期中考试高一数学试卷注意事项:1.本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分.2.本堂考试时间120分钟,满分150分.3.答题前,考生务必先将自己的姓名、学号填写在答题卡上,并使用2B 铅笔填涂.4.考试结束后,将答题卡交回.第Ⅰ卷 (选择题,共60分)一、选择题:本大题共12小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的.1.设集合{1,2,6},{2,4},{1,2,3,4}A B C ===,则()A B C ⋃⋂=( )A .{2}B .{1,2,4}C .{1,2,4,6}D .{1,2,3,4,6}2.下列各组函数中,表示同一个函数的是( )A.112--=x x y 与1+=x y B.x y =与)1,0(log ≠>=a a a y xaC.12-=x y 与1-=x y D.x y lg =与2lg 21x y =3.设全集U R =,集合1284x A x⎧⎫=<<⎨⎬⎩⎭,{}05B x x =<<,则韦恩图中阴影部分表示的集合是( )A.{}25x x -<<B.{}20x x -<≤C.{}35x x -<<D.{}35x x ≤<4.已知函数=⎩⎨⎧≥-<-=)2(,0)5(0)(log )(3f x x f x x x f 则( ) A .-1 B .1 C .0 D .2 5.已知函数)(54)12(R x x x f ∈+=-,若13)(=a f ,则实数a 的值为( )A.5B.4C.3D.2 6.已知5log 3=a ,23log 2b =,2.05-=c ,则c b a ,,的大小关系为( )A.a c b >>B. a b c >>C.c b a >>D.c a b >>7.函数2121xy =+-的部分图象大致为( ) A .B .C .D .8.已知函数0(1,1,3)(>⎩⎨⎧≥<+-=a x a x a x x f x且)1≠a 在R 上是减函数,则a 的范围为( ) A.)1,0( B.]21,0( C.)1,21[ D.),21[+∞9.已知)(x f y =是定义在R 上的函数,且)()4(x f x f -=+,如果当(]4,0∈x 时,x x f 3)(-=,则=)985(f ( ) A .9B .-9C .3D .-310.若函数)2(log 2+-=ax x y a 在区间(]1,∞-上为减函数,则a 的取值范围是( ) A .()1,0 B .[)3,2 C .[)+∞,2 D .)3,1(11.高斯是德国著名的数学家,近代数学奠基者之一,享有“数学王子”的称号,用其名字命名的“高斯函数”为:设x ∈R ,用[]x 表示不超过x 的最大整数,则[]y x =称为高斯函数,例如:[]2.13-=-, []3.13=,已知函数()121123x x f x +=-+,则函数[()]y f x =的值域是( )A .{}0,1B .{}1,1-C .{}1,0-D .{}1,0,1-12.已知函数⎩⎨⎧>+-≤<=3,430,log )(3x x x x x f ,若函数m y x f y ==与)(有三个不同的交点,其横坐标依次为,21,x x 3x ,且321x x x <<,则()3211x x x m-+的取值范围是( )A .)1,3(--B .)2,0(C .)3,1(-D .)0,3(第Ⅱ卷 (非选择题,共90分)二、填空题:本大题共4小题,每小题5分,共20分.把答案填在答题卡上. 13.已知集合},1{2a A =,}1,{-=a B ,若}1,,1{a B A -= ,则=a .14.函数)10(2)(2020≠>+=-a a a x f x 且的图象必经过定点 .15.已知函数)(x f 是奇函数,当0>x 时,)6()(x x x f +=,则当0<x 时=)(x f .16.定义域为R 的函数()f x 满足()()22f x f x +=,当[)0,2x ∈时,()[)[)2 1.5,0,10.5,1,2x x x x f x x -⎧-∈⎪=⎨-∈⎪⎩,若[)4,2x ∈--时,()142t f x t≥-恒成立,则实数t 的取值范围是 . 三、解答题:本大题共6小题,共70分.解答应写出文字说明、证明过程或演算步骤.17.(本小题满分10分)已知函数A x x x f 的定义域为集合)2lg()(2++-=,}2|{+≤≤=m x m x B . (Ⅰ)当2-=m 时,求B A ;(Ⅱ)若B B A = ,求实数m 的取值范围.18.(本小题满分12分)化简求值:(Ⅰ)2log 432302155327log 25.0)32()1613(+-+---π; (Ⅱ)已知52121=+-xx ,求54122-+++--x x x x 的值.19.(本小题满分12分)已知函数)10(≠>=a a a y x 且在[1,2]上的最大值与最小值之和为20,记2)(+=x xa a x f .(Ⅰ)求a 的值;(Ⅱ)求)20212020(......)20213()20212()20211(f f f f +++的值. 20.(本小题满分12分)某手机品牌公司生产某款手机的年固定成本为40万美元,每生产1万部还需另投入16万美元.设该公司一年内共生产该款手机x 万部并全部销售完,每万部的销售收入为)(x R 万美元,且⎪⎩⎪⎨⎧>-≤<-=404000074004006400)(2x x xx x x R(Ⅰ)写出年利润W (万美元)关于年产量x (万部)的函数解析式;(Ⅱ)当年产量为多少万部时,公司在该款手机的生产中所获得的利润最大?并求出最大利润.21.(本小题满分12分)已知()21,f x log a a R x ⎛⎫⎪⎝⎭=+∈. (Ⅰ)当1a =时,解不等式()1f x >;(Ⅱ)设0a >,若对任意1,12t ⎡⎤∈⎢⎥⎣⎦,函数()f x 在区间[],1t t +上的最大值与最小值的差不超过1,求a 的取值范围.22.(本小题满分12分)已知函数()()9log 91xf x kx =++,()k R ∈是偶函数.(Ⅰ)求k 的值;(Ⅱ)若()102b x x f ⎛⎫-+>⎪⎝⎭对于任意x 恒成立,求b 的取值范围; (Ⅲ)若函数[]8log ,0,1329)(921)(∈+⋅+=+x m x h x xx f ,是否存在实数m 使得)(x h 的最小值为0?若存在,求出m 的值,若不存在,请说明理由.成都外国语学校2020-2021学年度上期期中考试高一数学参考答案一、选择题二、填空题13.0 14.(2020,3) 15.)6(x x - 16.(](]1,02, -∞- 三、解答题17.(Ⅰ)}{21<<-=x x A ,}{22<≤-=x x B A 5分 (Ⅱ)01<<-m 10分 18.(Ⅰ)11(Ⅱ)211-各6分 19.(Ⅰ)4 5分 (Ⅱ)1010 12分 20.(1)利用利润等于收入减去成本,可得当040x <时,2()(1640)638440W xR x x x x =-+=-+-;当40x >时,40000()(1640)167360W xR x x x x=-+=--+ ∴W ={−6x 2+384x −40,0<x ⩽40−40000x−16x +7360,x >40; 6分(2)当040x <时,226384406(32)6104W x x x =-+-=--+,32x ∴=时,(32)6104max W W ==;当40x >时,400004000016736027360W x x x=--+-, 当且仅当4000016x x=,即50x =时,(50)5760max W W == 61045760>32x ∴=时,W 的最大值为6104万美元. 12分21.(Ⅰ)当1a =时,()22111f x log a log x x ⎛⎫⎛⎫⎪ ⎪⎝⎭⎝=+=⎭+ ()211112101111log x x x x f x ⎛⎫>++>∴>∴∴ ⎪⎝>⎭<∴<不等式解集为(0,1). 5分(Ⅱ)因为()f x 在(0,)+∞上单调递减,所以函数()f x 在区间[],1t t +上的最大值与最小值的差为()(1)t f f t -+,因此2211()(1)log log 11f t f t a a t t ⎛⎫⎛⎫-+=+-+≤ ⎪⎪+⎝⎭⎝⎭即2(1)10at a t ++-≥对任意1,12t ⎡⎤∈⎢⎥⎣⎦恒成立,因为0a >,所以2(1)1y at a t =++-在1,12t ⎡⎤∈⎢⎥⎣⎦上单调递增,所以21131(1)1(1)1=4242y at a t a a a =++-≥⨯++⨯-- 因此3120423a a -≥∴≥ 12分 22.(Ⅰ)函数()()9log 91xf x kx =++,()k R ∈是偶函数则满足()()f x f x =-所以()()99log 91log 91x xkx kx -++=-++即()()99919912log log log 991991x x x xx x kx x --++====-++ 所以21k =- 解得12k =-3分 (Ⅱ)由(1)可知,()()91log 912x f x x =-++,()102b x x f ⎛⎫-+> ⎪⎝⎭对于任意x 恒成立 代入可得()9log 910x x b +-->所以()9log 91xb x <+-对于任意x 恒成立令()()()999log 91log 91log 9xxxg x x =+-=+-99911log log 199x x x +⎛⎫==+ ⎪⎝⎭因为1119x +>所以由对数的图像与性质可得91log 109x ⎛⎫+> ⎪⎝⎭所以0b ≤ 7分 (Ⅲ)()()129231f x xxh x m +=+⋅+,[]90,log 8x ∈,且()()91log 912xf x x =-++代入化简可得()9232xxh x m =+⋅+令3x t =,因为[]90,log 8x ∈,所以t ⎡∈⎣则()()222222,p t t mt t m m t ⎡=++=++-∈⎣①当1m -≤,即1m ≥-时,()p t在⎡⎣上为增函数,所以()()min 1230p t p m ==+=,解得32m =-,不合题意,舍去 ②当1m <-<即1m -<-时,()p t 在[]1,m -上为减函数,()p t在m ⎡-⎣上为增函数,所以()()2min 20p t p m m =-=-=,解得m =,所以m =③当m ≤-,即m ≤-, ()p t 在⎡⎣上为减函数,所以()(min 100p t p ==+=解得m =不合题意,舍去,综上可知,m = 12分。
四川省成都外国语学校2020-2021学年高二下学期期中考试化学试题
成都外国语学校2020—2021学年度下期期中考试高二化学试卷注意事项:1、本试卷分Ⅰ卷(选择题)和Ⅰ卷(非选择题)两部分。
2、本堂考试100分钟,满分100分。
3、答题前,考生务必先将自己的姓名、学号填写在答卷上,并使用2B铅笔填涂。
4、考试结束后,将答题卡交回。
可能用到的相对原子质量: H-1 N-14 Al-27 O-16 C-12 Co-59Ⅰ卷(50分)选择题:本题共20小题,共50分。
1至10题,每小题2分。
11至20题,每小题3分。
每小题只有一个选项符合题目要求。
1.化学与生活、社会密切相关,下列说法正确的是()。
A.晶体硅常用做光导纤维的主要材料B.近年来已发布“空气质量日报”中,将CO2、SO2、NO2和可吸入颗粒物等列入了首要污染物C.煤炭经气化、液化和干馏等过程,可获得清洁能源和重要的化工原料D.SO2可以用来漂白纸浆、毛、丝、草帽辫、增白食品等2.下列有关化学用语的表示正确的是()A. 14C 的原子结构示意图:B.四氯化碳分子的比例模型:C. HClO 的结构式:H–Cl–OD.PH3的电子式:3.下列各组物质的分类正确的是()①同位素:1H、2H2、3H ②同素异形体:C80、金刚石、石墨③酸性氧化物:CO2、NO、SO3 ④混合物:水玻璃、水银、水煤气⑤电解质:明矾、冰醋酸、石膏⑥干冰、液氯、乙醇都是非电解质A.②⑤B.②⑤⑥C.②④⑤⑥D.①②③④⑤⑥4.下列有关共价键和键参数的说法不正确的是()A.一个丙烯(C3H6)分子中含有9个σ键和1个π键B.碳碳双键的键能不为碳碳单键键能的两倍C.C-H 键比S i-H 键键长更短,故C H4比S iH4 更稳定D.由于孤电子对的存在,H2O 分子的键角小于109°28′5.下列分子或离子中,中心原子含有孤电子对的是A.NH4+B.SiH4C.H3O+D.SO42-6.下列物质的转化在给定条件下能实现的是()①Al2O3NaAlO2(aq ) Al(OH)3②S SO3H2SO4③Fe2O3FeCl3 (aq) 无水FeCl3④饱和NaCl(aq) NaHCO3Na2CO3⑤MgCl2 (aq) Mg(OH)2MgOA.①③⑤B.①④⑤C.②④⑤D.②③④7.N A代表阿伏加德罗常数的值。
四川省成都市2019-2020学年九年级上学期期中英语试卷精选汇编:阅读短文 判断正误
阅读短文判断正误成都市石室教育集团2019-2020 学年上期九年级半期英语考试试题八. 阅读下面短文,根据短文内容判断句子正误。
正确的写A,错误的写B. (共5小题,每小题2分:计10分)This is a world filled with all kinds of products. Though they belong to different kinds of brands, they are usually thought to be symbols of an easy and convenient life. We can hardly imagine what our life will be like . So how much do you know about these excellent products ?( )61. From the chart, Longines watch is more expensive than a LV handbag.( ) 62 According to the article, steel is used for making all these four products.( ) 63. HA V ALH6 produced in China is used to travel farther and only in the wild( ) 64 The newest I phone 11 Pro Max can be bought with 9590 Yuan.( )65 In most people’s views, our lives will be inconvenient without these products.61-65 BABBA四川成都树德实验中学九年级上2019-2020半期试卷八、阅读判断正误。
正确的填“A”,错误的填“B"。
四川省成都实验外国语学校2023-2024学年化学九年级第一学期期中复习检测试题含解析
四川省成都实验外国语学校2023-2024学年化学九年级第一学期期中复习检测试题考生须知:1.全卷分选择题和非选择题两部分,全部在答题纸上作答。
选择题必须用2B铅笔填涂;非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。
2.请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。
3.保持卡面清洁,不要折叠,不要弄破、弄皱,在草稿纸、试题卷上答题无效。
一、单选题(本大题共15小题,共30分)1.实验室有一瓶标签脱落的无色溶液,要确定它是否是稀盐酸.你认为应该用下列哪种方法最能获得满意的结果( )A.猜想假设B.上网查资料C.进行实验D.交流讨论2.学习完“原子的构成”之后,萍萍同学形成了以下认识,其中错误的是A.原子由居于中心的原子核和核外电子构成B.核外电子在离核远近不同的区域中运动C.原子核的质量和电子的质量相差不大D.原子核的体积与整个原子的体积相比要小很多3.为节约用水,下列生活中的做法不正确的是()A.用盆接水洗菜B.用养鱼水浇花草C.使用节水龙头D.丢弃未喝完的矿泉水4.下列属于化学研究内容的是A.研究家用电器怎样更省电B.研究汽车行驶中的加速问题C.破译人类基因密码D.研究以石油、煤为原料制造合成纤维的途径5.图中所示实验操作正确的是()A.倾倒液体B.点燃酒精灯C.取用固体粉末D.称量固体6.下列有关元素与人体健康的说法不正确的是( )A.人体必需的元素有10多种B.缺钴、铁易得贫血症C.缺钙有可能导致骨骼疏松、畸形,易得佝偻病D.缺碘会使儿童发育停滞,智力低下,严重会得侏儒症7.下列各图中和分别表示不同元素的原子,下列说法中正确的是( )B图中只含有2种分C表示单质D表示6个CO分子A表示混合物子A.A B.B C.C D.D8.下列关于氧气说法错误的是()A.工业上可以利用分离液态空气法制取氧气B.氧气可以支持燃烧,说明氧气具有可燃性C.空气中的氧气与水中溶解的氧气化学性质同样活泼D.氧气能供给呼吸,它和体内物质反应释放能量,维持生命活动9.下列实验操作不符合规范的是()A.A B.B C.C D.D10.用分子的观点解释下列事实,其中错误的是()A.水与过氧化氢化学性质不同﹣﹣分子构成不同B.春天百花盛开,花香四溢﹣﹣分子在不断运动C.水沸腾后壶盖被顶起﹣﹣温度升高,分子的体积变大D.50mL水与50mL酒精混合,液体总体积小于100mL﹣﹣分子之间有间隔11.初三某班的小朱人称“小马虎”,下面是从他的笔记中摘录的部分化学用语,你认为正确的是()A.氯元素:CLB.2个一氧化碳分子:2 CoC.+2Mg O:数字“2”表示氧化镁中镁元素的化合价为+2D.Ca2+:数字“2”表示每个钙离子带2个电荷12.性质决定用途。
四川省成都外国语学校2021高一12月月考化学试题
第II卷(非选择题)
二.填空题(共4个题,50分)
26.(12分)常温下,二氧化氯(ClO2)为黄绿色气体,具有强氧化性而能用于自来水的消毒。与Cl2相比,ClO2不会产生对人体有潜在危害的有机氯代物,已被联合国世界卫生组织(WHO列为AI级高效安全消毒剂
①锂沉入水中 ②锂浮在水面上 ③水中有大量气泡 ④反应后在水中加入几滴石蕊试液,溶液变红 ⑤反应剧烈,发出紫红色火焰 ⑥锂四处游动
A.②⑥B.①③C.②③⑤D.②④⑤⑥
6.下列关于实验室保存药品的方法,错误的是( )
A.过氧化钠密封保存在细口玻璃瓶中B.NaOH溶液保存在带橡胶塞的试剂瓶中
C.硫酸亚铁溶液在保存时应加入铁粉D.金属钠保存在液体石蜡或煤油中
A.气体所含氧原子数:甲<乙B.气体压强:甲〈乙
C.气体分子数:甲〈乙D.气体质量:甲<乙
16.工业上冶炼钼的化学原理为:
①2MoS2+7O2 2MoO3+4SO2②MoO3+2NH3·H2O=(NH4)2MoO4+H2O
③(NH4)2MoO4+2HCl=H2MoO4↓+2NH4Cl ④H2MoO4 MoO3+H2O
阴离子
SO42—CO32—NO3-OH−
为了鉴别上述化合物。分别完成以下实验,其结果是:
①将它们溶于水后,D为蓝色溶液,其他均为无色溶液;
②将E溶液滴入到C溶液中出现白色沉淀,继续滴加,沉淀溶解;
③进行焰色反应,只有B、C为紫色(透过蓝色钴玻璃);
④在各溶液中加入氯化钡溶液,A、C和D中都能产生白色沉淀;再加过量稀盐酸,仅A中沉淀溶解;
C.Fe → Fe3O4→ Fe(OH)3→ Fe2O3
常州市2018~2019学年九(上)期中化学试卷及答案
2018~2019学年度第一学期期中质量调研九年级化学试题说明:1.本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。
2.试卷满分为100分。
考试时间为90分钟。
3.可能用到的相对原子质量:Ar(H)=1 Ar(C)=12 Ar(O)=16 Ar(Cu)=64第Ⅰ卷(选择题共40分)一、选择题(本题包括20小题,每小题2分,共40分。
每小题只有一个选项....符合题意。
请将答案按序号统一填写到题后的表格中)1.春秋原始青瓷簋是常州博物馆馆藏精品,出土于淹城遗址,显示了古人智慧。
瓷器制作工艺中主要发生化学变化的是A.采石制泥B.拉坯造型C.晒坯醮釉D.烧窖成瓷2.生活中常接触到“含氟牙膏”、“富硒茶叶”等用品,这里的氟、硒指的是A.元素B.单质C.原子D.分子3.下列物质由阴、阳离子构成的是A.金刚石B.干冰C.铜D.氯化钠4.下列人体所缺元素与引起的健康问题,关系错误的是A.缺铁会引起贫血症B.缺碘会引起骨质疏松症C.缺钙会引起佝偻病D.缺锌会引起侏儒症5.下列物质名称和对应的化学式都正确的一组是A.铝aL B.氯化铵NH4Cl C.氧化铁FeO D.碳酸氢H2CO3 6.地球大气层中二氧化碳含量不断增加的后果主要是A.温室效应B.火灾频繁C.臭氧空洞D.毒害作物7.下列对实验现象的描述正确的是A.空气中点燃红磷,产生白雾B.盐酸中添加铜绿,溶液变红C.空气中点燃镁条,耀眼白光D.蜡烛燃烧生成水和二氧化碳8.要区分下列各组物质,所选择的方法(或试剂)不正确的是A.O2和N2——燃着的木条B.硬水和软水——肥皂水C.蒸馏水与食盐水——过滤D.H2和CO2——紫色石蕊试液9.《本草纲目》中记载的下列四种药物,其成分中Hg的化合价为0的是A.水银(Hg) B.升丹(HgO) C.朱砂(HgS) D.轻粉(Hg2Cl2) 10.17世纪初,比利时化学家海尔蒙特发现木炭燃烧后有不可见的物质产生,他命名为gas sylvestris(森林之精),并通过实验证明该物质不助燃,烛火在其中会熄灭。
四川省成都外国语学校2023-2024学年高一上学期10月月考化学试题
成都外国语学校2023—2024学年度上期10月月考高一化学试卷注意事项:1、本试卷分Ⅰ卷(选择题)和Ⅱ卷(非选择题)两部分。
2、本堂考试60分钟,满分 100分。
3、答题前,考生务必先将自己的姓名、学号填写在答题卡上,并使用2B 铅笔填涂。
4、考试结束后,将答题卡交回。
第I卷选择题一、选择题(本题共18 小题,每小题3分,共54分。
每小题只有一个选项符合题意)1. 生活中很多现象与化学反应有关。
下列现象与氧化还原反应无关的是( )A. 月饼盒内放脱氧剂B. 石膏溶液点豆腐C. 含Fe²⁺的补血药片采用糖衣包裹D. 食物的腐败2.分类是学习和研究化学的一种常用的科学方法。
下列分类合理的是( )A. 根据SiO⁺是酸性氧化物,判断其可与 NaOH 溶液反应B. 金属氧化物一定是碱性氧化物C. 根据丁达尔现象将分散系分为胶体、溶液和浊液D. 根据酸分子中H原子个数分为一元酸、二元酸等3. 下列物质的水溶液和熔融状态均能导电的是 ( )A. Cl⁺B. NaClC. CH⁺CH⁺OHD. H⁺SO⁺4. 下列关于胶体和溶液的说法中,不正确的是( )A. 冶金厂常用高压电除去烟尘,是因为烟尘微粒带电荷B. 氢氧化铁胶体与氯化镁溶液中加入氢氧化钠溶液都能沉淀,二者产生沉淀的原理相同C. 光线通过时,胶体产生丁达尔效应,溶液则无丁达尔效应D. 氢氧化铁胶体与氯化镁溶液的本质区别是前者分散质粒子的直径较大5. 下列说法正确的是 ( )A.颗粒物(直径小于等于 2.5 微米)扩散在空气中都会形成胶体B.H⁺+OH⁺=H⁺O 可表示所有的酸碱中和反应C. CO属于非金属氧化物,也属于酸性氧化物D. 硫酸钠采用交叉分类法分类既属于硫酸盐又属于钠盐,同时也属于含氧酸盐6. 下列变化过程一定需要加入还原剂的是( )A. KCl→KClO⁺B. KCl→AgClC.H⁺→H₂D. C→CO⁺7. 下列电离方程式中,正确的是( )A. 硫酸钠溶液: Na 2SO 4=Na ++2SO 42−B. 熔融状态的硫酸氢钠: NaHSO 4=Na ++H ++SO 42−C. 硫酸铝溶液: Al 2(SO 4)3=2Al 3++3SO 42−D. 次氯酸钙溶液: Ca (ClO )₂=Ca²⁺+2Cl⁻+2O²⁻8. 在一定条件下, NO 跟 NH⁺可以发生反应:NO+NH⁺→N⁺+H⁺O(未配平),该反应中被氧化和被还原的氮元素的质量比是 ( )A. 3∶2B. 2∶1C. 1∶1D. 2∶3 9. 下列说法不正确的是 ( )①只含有一种元素的物质一定是纯净物 ②生石灰做干燥剂涉及化学变化 ③酸性氧化物一定是非金属氧化物 ④碱性氧化物一定是金属氧化物 ⑤用鸡蛋壳膜和蒸馏水除去淀粉胶体中的食盐不涉及化学变化 ⑥两种盐反应一定生成两种新盐A. ①③⑥B. ①②③④⑤C. ①④⑥D. ②④⑤10.氧化还原反应与四种基本反应类型的关系如下图所示,则下列化学反应属于阴影部分的是( )A. Cl⁺+2KBr=Br⁺+2KClC. 4Fe(OH)⁺+O⁺+2H⁺O=4Fe(OH)⁺ B.2NaHCO 3Na 2CO 3+CO 2↑+H 2OD. 2Na⁺O⁺+CO⁺=2Na⁺CO⁺+O⁺(提示:Na⁺O⁺中氧元素的化合价为1 价) 11. 下列关于物质分类的正确组合是( )一元碱 一元酸 正盐 碱性氧化物 酸性氧化物 A NH⁺·H⁺O HCl Na⁺CO⁺ Al⁺O⁺ CO⁺ B NaOH HCl NaCl Na⁺O CO C Mg(OH) Cl H⁺SCaF⁺Mn⁺O⁺ SO⁺ DKOHCH⁺COOH CaCO⁺CaOSO⁺12.某溶液中可能含有2-4SO 、2-3CO 、Cl⁺。
