必修二基础练习

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高中英语新北师大版必修二 Unit6 单元基础知识练习(附参考答案)

高中英语必修二 Unit 6基础知识练习班级考号姓名总分重点单词一、核心词汇1.There was once a guy who suffered from cancer, one that can't be ___________(治愈).2.Just before September, Miller was ___________(撞击) by a car and lost his right arm.3.She decided to go back to college to advance her ___________(事业) and to be able to better support her family.4.In spite of difficulties, the mayor never abandoned___________(改革) education system in our city.5.Summer Company provides students with hands－on business training and___________(奖金) of up to $3，000 to start and run their own summer businesses.6.You are definitely welcome to show up on___________(舞台), which will add color and fun to our festival.7.A dog's eating habit requires regular training before it is properly ___________(建立).8.These films can help foreign friends better understand this land—Chinese___________(文学), geography, history, fooD.9.Though the country is very small, oil is one of its greatest ___________(资源).10.She has brought out her ___________(潜力) in running, but she needs training.11.They launched an appeal for ___________(种族的) and religious tolerance.ndslide is a kind of very ___________(很严重的) nature disaster, which can result in great loss to human.13.We ___________(尊敬) him for his wide range of knowledge.二、拓展词汇1.___________adj.令人钦佩的；极其出色的→admirevt.钦佩；欣赏→admirationn.钦佩；羡慕2.___________adj.无私的；慷慨的；大方的→generouslyadv.慷慨地；宽大地；丰盛地→generosityn.慷慨；大方；宽宏大量3.___________n.表彰；赞扬→recognizev.认识；认出；辨别出；承认4.___________n.化学品 adj.化学的→chemistryn.化学→chemistn.药剂师；化学家5.___________adj.有限的→limitv.&n.限制→limitlessadj.无限的6.___________n.知识，学问；智慧→wiseadj.充满智慧的；明智的；英明的7.___________n.发展；进步→advancedadj.先进的；高级的；高等的8.___________adj.鼓舞人心的→inspirev.激励，激发；鼓舞；唤起；启示→inspirationn.激励，激发；启示；灵感→inspiredadj.受鼓舞的；卓越的；激动人心的9.___________n.认识；意识→awareadj.意识到的10.___________n.组织；团体；机构→organisev.组织→organisedadj.有组织的；系统的；有条理的11.___________n.忧郁，沮丧，消沉；抑郁症→depressv.使沮丧，使意志消沉，使心灰意冷→depressedadj.忧郁的；沮丧的→depressingadj.令人沮丧的12.___________n.投入，忠诚，奉献；承诺→commitv.做出(错或非法的事)；犯(罪或错等)；自杀；承诺，保证13.___________vi.参加，参与→engagedadj.被占用的；使用中的；忙于；从事于；已订婚的→engagementn.订婚；约定14.___________adj.精力充沛的，充满活力的→energyn.精力三、运用练习1.His speech was so ___________ that his students were ___________ to study harder than ever before.(inspire)2.(1)I haven't seen Sara since she was a little girl, and she has changed beyond ___________(recognize).(2)It ___________(recognize) that Jane is the most intelligent girl among us.3.(1)He suffered from acute ___________(depress) after the accident.(2)Alice Munro has a reputation for being a very ___________(depress) writer.4.(1)He was really an ___________(admire) hero and all the surrounding people cheered for him.(2)When I saw him, he was looking at the picture with ___________(admire).5.(1)He donated ___________(generous) a large amount of money to the school.(2)I'd like to express my admiration for your ___________(generous).6.(1)But he quickly found that he loved playing basketball, and was___________(commit) to practicing it so that within a couple of months he was playing reasonably well.(2)He made a ___________(commit) that he would attend the ceremony on behalf of his school.7.(1)Scientists have known how to make use of the ___________（limit) power of the sun.(2)The natural resources we have are ___________.Therefore we have no reason to waste the precious resources without ___________.(limit)8.(1)I find that doing physical exercise a couple of times a week makes me feel more ___________(energy).(2)You'll need to devote all your ___________(energy) to your jo重点短语一、填写1.___________ 偶遇2.___________ 由于，因为3.___________ 挑选4.___________ 尽管……(仍……)；虽然；不顾5.___________ 被认为，被看作6.___________ 在……帮助下7.___________ 除……之外8.___________ 努力争取，为……斗争9.___________ 灭火10.___________ 为纪念……11.___________ 困于12.___________ 主修13.___________ (使)从事，参加二、运用1.I was taking a walk when I ___________ my aunt.2.Perhaps you can help me ___________ a pair of jeans now, since you are an expert.3.___________the fact that I don't like my job, I must work very harD.4.___________my classmates and teachers, I have caught up with the others.5.When this monument ___________ the hero was first shown to the public, the day was declared a holiday.6.She ___________ maths and physics at university.7.___________some spelling mistakes，the composition is fairly gooD.8.Doctors have ___________ more than six hours to save his life.9.If there is no rain, fireman will have no water to ___________.10.___________a terrible flu that is going on, many students don't show up to school today.重点句型[句型1] “not only...but also...”意为“不但……而且……”This is not only an honour for myself, but also recognition of and encouragement for all scientists in China.[仿写1] 母亲们不但得不到报酬，而且她们所做的那些乏味艰苦的工作常常都不为人所注意。

地理必修二必刷题练习册

地理必修二必刷题练习册一、选择题1. 地球的自转周期是多久？A. 24小时B. 48小时C. 72小时D. 96小时2. 以下哪个国家不属于欧洲？A. 法国B. 德国C. 意大利D. 巴西3. 世界上最深的海沟是？A. 马里亚纳海沟B. 阿留申海沟C. 秘鲁-智利海沟D. 日本海沟4. 以下哪种气候类型主要分布在赤道附近？A. 热带雨林气候B. 温带季风气候C. 寒带气候D. 沙漠气候5. 世界上最大的沙漠是？A. 撒哈拉沙漠B. 戈壁沙漠C. 阿拉伯沙漠D. 卡拉哈里沙漠二、填空题6. 地球的自转轴与公转轨道平面的夹角约为______度。

7. 地球上的五大洲分别是亚洲、欧洲、非洲、北美洲和______。

8. 地球的公转周期是一年，即大约______天。

9. 世界上最大的淡水湖是______湖。

10. 世界上最大的岛屿是______岛。

三、简答题11. 简述地球的自转和公转对地理环境的影响。

四、论述题12. 论述不同气候类型对人类生活和生产活动的影响。

答案：1. A2. D3. A4. A5. A6. 23.57. 南美洲8. 3659. 苏必利尔10. 格陵兰11. 地球的自转和公转对地理环境有着深远的影响。

自转使得地球上的地区经历昼夜交替，影响生物的生活节奏和地理环境的热力分布。

公转则导致季节的更替，影响气候类型和植被分布。

12. 不同气候类型对人类生活和生产活动有着显著的影响。

例如，热带雨林气候区适宜种植热带作物，但湿热的环境可能对人体健康构成挑战；温带季风气候区四季分明，适宜农业发展，但旱涝灾害可能影响作物产量；寒带气候区则因低温而限制了农业生产，但丰富的冰雪资源可以发展冰雪旅游等活动。

结束语：本练习册旨在帮助学生巩固地理必修二的知识点，通过不同类型的题目，提高学生对地理知识的理解和应用能力。

希望同学们能够认真完成练习，不断提升自己的地理素养。

外研版高中英语必修二Module 2 课时基础练习(含答案)

Module 2No DrugsPeriod One Reading Comprehension一.用适当的介、副词填空1．I bought cannabis from a man ________ the street.2．Users who inject the drug are also ________ more danger if they share needles ________ other users.3．Crack cocaine is the most addictive form ________ cocaine.4．Users become addicted ________ crack cocaine much more easily if they smoke it. 5．When I went ________ to the man again，I wanted more crack cocaine.6．But he asked me ________ a lot of money.7．I didn’t have enough money ________ he didn’t give me any drugs.8．I was ________ terrible pain.9．The next day，I broke ________ a house and stole a television and a video recorder. 10．________ a result，cocaine users sometimes have heart attacks.二.佳句翻译与仿写1．I’m 19 years old and I used to be a drug addict.翻译：_____________________________________________________________________仿写：他现在是一名作家，曾经是一名工人。

外研版高中英语必修二Module 4 课时基础练习(含答案)

Module 4Fine Arts—Western，Chinese and Pop ArtsPeriod One Reading Comprehension一.用适当的介、副词填空1．Cubist artists painted objects and people，with different aspects of the object or person showing ________ the same time.2．For example，it shows things such ________ soup cans and advertisements. 3．Chinese painting is known ________ its brush drawings ________ black inks and natural colours.4．Qi Baishi observed the world of nature very carefully，and his paintings are special because ________ this.5．Like Qi Baishi，Xu painted ________ the traditional Chinese style.6．I’m studying art ________ school，and I enjoy it a lot，although I can get tired ________ looking at pictures all the time.7．I’m crazy ________ the paintings of Qi Baishi.8．My parents are fond ________ going to art galleries and often take me with them. 9．So I’ve developed an interest ________ art.10．I can tell ________ the style.二.佳句翻译与仿写1．This is a painting by the Spanish artist，Pablo Picasso，considered to be the greatest western artist of the twentieth century.翻译：_____________________________________________________________________仿写：这是青岛市，被认为是山东最美的城市之一。

高二物理必修二各章节练习(非常全面好用)

高二物理必修二各章节练习(非常全面好
用)
本文档旨在为高二学生提供一份非常全面且实用的物理必修二
各章节练。

以下是每个章节的练内容：
第一章：电场
- 选择题：20道题，涵盖了电场的基本概念、电场强度的计算
等方面。

- 解答题：10道题，考察了电场中带电粒子的运动、电势能等
问题。

第二章：电容与电
- 选择题：15道题，包含了电容的定义、电的组成和特点等方面。

- 解答题：8道题，涉及电容的串并联、电的充放电等知识点。

第三章：电流与电阻
- 选择题：18道题，内容涉及电流的定义、欧姆定律、电阻的串并联等内容。

- 解答题：12道题，考察了电流的计算、电阻的变化对电路的影响等问题。

第四章：电磁感应
- 选择题：20道题，包含了法拉第电磁感应定律、电磁感应现象的应用等方面的内容。

- 解答题：10道题，涉及电磁感应中电动势、自感等问题。

第五章：电磁波
- 选择题：15道题，内容涵盖了电磁波的基本特性、电磁波的产生等方面。

- 解答题：8道题，考察了电磁波的传播特性、电磁波的应用等知识点。

第六章：光的折射与全反射
- 选择题：18道题，包含了折射定律、全反射现象等方面的内容。

- 解答题：12道题，涉及光的折射、全反射的应用等问题。

第七章：光的干涉与衍射
- 选择题：20道题，内容涉及光的干涉、衍射的基本原理以及干涉、衍射的应用等方面。

- 解答题：10道题，考察了干涉、衍射的实验现象、干涉条纹的特点等知识点。

以上是高二物理必修二各章节练习的内容。

希望这份文档对学生们的物理学习有所帮助。

集宁一中高中化学必修二第六章《化学反应与能量》基础练习(含解析)

一、选择题1．Mg-AgCl电池是一种能被海水激活的一次性贮备电池，电池反应方程式为：2AgCl+ Mg =Mg2++ 2Ag+2Cl-。

有关该电池的说法正确的是A．Mg为电池的正极B．负极反应为AgCl+e-=Ag+Cl-C．Cl-移向负极D．电流由镁电极经外电路流向正极2．下列有关化学反应速率的说法正确的是A．用铁片和稀硫酸反应制取氢气时，改用98%的浓硫酸可以加快产生氢气的速率B．100mL2mol/L的盐酸跟锌片反应，加入适量的氯化钠溶液，反应速率不变C．NH3的催化氧化是一个放热的反应，所以，升高温度，反应的速率减慢D．在一定温度下固定容积的容器中，发生SO2的催化反应，充入He，反应速率不变3．为比较Fe3+和Cu2+对H2O2分解反应的催化效果，甲、乙两位同学分别设计了如图甲、乙所示的实验。

下列叙述中不正确的是A．通过图甲实验产生气泡的快慢能比较Fe3+和Cu2+对H2O2分解的催化效果B．用图乙装置判断反应速率的大小，可测定反应产生相同气体体积所需的时间C．图乙实验中，如t s内针筒收集到V mL气体，则用O2表示的反应速率为VtmL/sD．为检查图乙装置的气密性，可关闭A处活塞，将注射器活塞推进一定距离后松开活塞，观察活塞是否回到原位4．利用石灰乳和硝酸工业的尾气(含NO、NO2)反应，既能净化尾气，又能获得应用广泛的Ca(NO3)2，其部分工艺流程如图：下列说法不正确的是A．上述工艺中吸收过程：尾气从吸收塔底部进入，石灰乳从吸收塔顶部喷淋，其目的是使尾气中NO、NO2提高吸收效率B．滤渣的主要成分为Ca (NO2)2C．为提高Ca(NO2)2的产率及纯度，则n(NO)：n(NO2)应控制为 1：1D．生产中溶液需保持弱碱性5．下列实验方案不能达到相应实验目的的是实验目的实验方案A制备CuSO4用稀硫酸、过氧化氢和铜粉反应B 加快酸性KMnO4与H2C2O4溶液的反应速率加入一粒黄豆大的MnSO4固体C 除去NaC1固体表面的少量KC1杂质用饱和NaC1溶液洗涤D 探究浓度对反应速率的影响向盛有同体积、不同浓度NaHSO3溶液的试管中同时加入同体积、同浓度NaC1O溶液，观察现象A．A B．B C．C D．D6．一定温度下，将纯净的氨基甲酸铵(NH2COONH4)置于真空密闭恒容容器中(固体试样体积忽略不计)达到分解平衡：NH2COONH4(s)2NH3(g)+CO2(g)。

2021年高中化学必修二第六章《化学反应与能量》基础练习(提高培优)(1)

一、选择题1．硫代硫酸钠溶液与稀硫酸反应的化学方程式为：Na 2S2O3+H2SO4=Na2SO4+SO2+S↓+H2O，下列各组实验中最先出现浑浊的是( )实验反应温度/℃Na2S2O3溶液稀H2SO4V/mL c/mol·L-1V/mL c/mol·L-1A2550.1100.1B2550.2100.2C3550.1100.1D3550.2100.2A．A B．B C．C D．D2．过量铁与少量稀硫酸反应，为了加快反应速率，但是又不影响生成氢气的总量，可以采取的措施是A．加入适量NaCl溶液B．加入适量的水C．加入几滴硫酸铜溶液D．再加入少量稀硫酸3．一定温度下，向容积为4L的密闭容器中通入两种气体发生化学反应，反应中各物质的物质的量变化如图所示，下列对反应的推断合理的是A．该反应的化学方程式为3B+4C⇌6A+3DB．反应进行到1s时，υ(A)=υ(D)C．反应进行到6s时，各物质的反应速率相等D．反应进行到6s时，B的平均反应速率为0.025mol⋅(L⋅s)−14．可以将反应Zn+Br2=ZnBr2设计成原电池，下列4个电极反应中，分别表示正极反应和负极反应的是①Br2+2e-=2Br-②2Br--2e-=Br2 ③Zn-2e-=Zn2+④Zn2++2e-=ZnA．②和③B．①和④C．②和④D．①和③5．下列实验操作能达到实验目的的是选项实验操作实验目的A用铂丝蘸取某碱金属的盐溶液灼烧，观察现象证明其中含有K+B 将等浓度等体积的KI溶液和FeCl3溶液混合，充分反应后滴入KSCN溶液溶液中存在平衡：3+-2+22Fe+2I2Fe+IC用稀硫酸和锌粒制取H2时，加几滴CuSO4溶液CuSO4作反应的催化剂D蒸发铝与稀盐酸反应的溶液制备无水AlCl3A．A B．B C．C D．D6．在2A(s)+B(g) ⇌ 3C(g)+4D(g)反应中，表示反应速率最快的是()A．v(A)＝0.5 mol/(L•s)B．v(B)＝0.2 mol/(L•s)C．v(C)＝18 mol/(L•min)D．v(D)＝0.6 mol/(L•s)7．在一密闭容器中进行反应：2SO2(g)+O2(g)2SO3(g)，已知反应过程中某时刻SO2、O2、SO3的浓度分别为0.8 mol/L、0. 4 mol/L、0.8mol/L，当反应达平衡时，可能存在的数据是A．SO2为 1.6 mol/L，O2为0.8 mol/L B．SO2为 1.0mol/LC．SO3为1.6 mol/L D．SO2、SO3一定均为0.6 mol/L8．节能减排是保护环境的有力手段，利用如图所示的装置处理工业尾气中的硫化氢具有明显优势。

高中化学必修二第七章《有机化合物》基础练习(1)

一、选择题1．利用反应5NaCl+2CO2+2H2O通电5NaClO+C2H4O(环氧乙烷)可实现低压高效电催化还原CO2。

下列化学用语正确的是A．NaClO的电子式：B．Cl-的结构示意图：C．CO2的比例模型：D．环氧乙烷的结构简式：2．下列有关叙述正确的是（）A．蛋白质溶液中加入饱和CuSO4溶液可发生盐析B．1mol甲烷完全燃烧生成O2和H2O(l)时放出890kJ热量，它的热化学方程式为：1 2CH4(g)+O2(g)=12CO2(g)+H2O(1)△H=-445kJ/molC．酸性氢氧燃料电池负极反应为H2-2e-＋2OH-=2H2OD．CH3COOH与NaOH溶液反应：H+(aq)+OH-(aq)=H2O(1)△H=-57.3kJ•mo1-l3．下列实验操作能达到目的的是实验目的实验操作A除去乙烷中的乙烯将混合气体通入酸性高锰酸钾溶液B除去乙醇中的水加入生石灰，蒸馏C鉴别苯和环己烷加入溴水振荡，静置后观察分层及颜色差异D分离苯和溴苯加水后分液4．化学与抗击“新冠”病毒密切相关。

下列说法错误的是A．双氧水中含有H2O2分子B．“84”消毒液应该避光保存C．过氧乙酸(CH3COOOH)的相对分子质量为76D．75%的酒精消毒效果不如95%的酒精5．下列实验方案能达到目的的是A．用浓硫酸干燥NH3B．用焰色反应鉴别KCl和K2SO4C．用NaOH溶液除去Cl2中的HCl D．用灼烧闻气味的方法鉴别棉线和羊毛线6．实验室采用如图所示装置制备乙酸乙酯，实验结束后，取下盛有饱和碳酸钠溶液的试管，再沿该试管内壁缓缓加入紫色石蕊试液1毫升，发现紫色石蕊试液存在于饱和碳酸钠溶液层与乙酸乙酯液层之间(整个过程不振荡试管)，下列有关该实验的描述，不正确的是（）A ．制备的乙酸乙酯中混有乙酸和乙醇杂质B ．该实验中浓硫酸的作用是催化和吸水C ．饱和碳酸钠溶液主要作用是降低乙酸乙酯的溶解度及吸收乙醇、中和乙酸D ．石蕊层分为三层，由上而下是蓝、紫、红 7．下列说法中，错误的是A ．分子式符合C n (H 2O)m 通式的物质不一定都是糖类B ．油脂、淀粉、纤维素都是天然有机高分子化合物C ．氨基酸是两性化合物，能与强酸、强碱反应生成盐D ．单糖是不能发生水解的最简单的糖类 8．下列关于有机物的说法中，正确的是A ．等质量的苯、甲苯、乙烯、甲烷分别在足量氧气中完全燃烧时，消耗氧气物质的量最多的是甲苯B ．纤维素−−−→水解葡萄糖→氧化CO 2和H 2O(释放能量维持生命活动)C ．光照条件下，控制CH 4和Cl 2的比例为1∶1，能够制得纯净的CH 3Cl 和HClD ．石油裂解与裂化的原理相同、目的不同 9．下列物质的检验、分离和提纯方法，不正确的是 A ．用分液漏斗分离四氯化碳与水 B ．用硝酸银溶液检验自来水中的氯离子 C ．用溴水区别乙烯与甲烷D ．用浓硫酸干燥NH 310．贵金属钯可催化乙醇羰基化，反应过程如图所示，下列说法错误的是A．C－H键所处环境不同，稳定性也不同B．贵金属钯也可将R2CHOH羰基化C．反应物CH3CH2OH→产物CH3CHO，发生了氧化反应D．反应过程中，Pd的成键数目保持不变二、填空题11．(1)写出S2Cl2的结构式：___________； NH4F的电子式：___________。

高中化学练习册答案必修二

高中化学练习册答案必修二【练习一：化学计量学基础】1. 计算1摩尔氢氧化钠（NaOH）的质量。

答案：NaOH的摩尔质量为23（Na）+ 16（O）+ 1（H）= 40g/mol，所以1摩尔NaOH的质量是40g。

2. 将1.5摩尔的硫酸（H2SO4）换算成质量。

答案：H2SO4的摩尔质量为2*1（H）+ 32（S）+ 4*16（O）=98g/mol，1.5摩尔H2SO4的质量为1.5 * 98g = 147g。

3. 计算1升0.5摩尔/升的盐酸（HCl）溶液中HCl的物质的量。

答案：1升0.5摩尔/升的HCl溶液中含有0.5摩尔HCl。

【练习二：化学反应速率】1. 描述影响化学反应速率的外界因素。

答案：影响化学反应速率的外界因素包括温度、压力、反应物浓度、催化剂以及光照等。

2. 根据阿累尼乌斯方程解释温度对反应速率的影响。

答案：阿累尼乌斯方程为k = Ae^(-Ea/RT)，其中k是反应速率常数，A是频率因子，Ea是活化能，R是气体常数，T是温度。

温度升高，e^(-Ea/RT)的值增大，因此反应速率常数k增大，反应速率加快。

【练习三：化学平衡】1. 描述勒夏特列原理。

答案：勒夏特列原理指出，当一个处于平衡状态的系统受到外部条件的改变时，系统会自动调整以减少这种改变的影响，即平衡会向减弱外部条件变化的方向移动。

2. 举例说明化学平衡的移动。

答案：例如，对于反应N2(g) + 3H2(g) ⇌ 2NH3(g)，如果增加反应物N2的浓度，平衡会向右移动，生成更多的NH3。

【练习四：氧化还原反应】1. 定义氧化还原反应。

答案：氧化还原反应是指在化学反应中，原子或离子之间发生电子转移的反应，其中一部分物质被氧化，另一部分物质被还原。

2. 举例说明氧化还原反应。

答案：例如，锌与稀硫酸的反应，Zn(s) + H2SO4(aq) →ZnSO4(aq) + H2(g)，锌被氧化，硫酸中的氢离子被还原。

【结束语】通过本练习册的练习，同学们应该对化学计量学基础、化学反应速率、化学平衡以及氧化还原反应有了更深入的理解。

北师大版高中英语基础练习题必修二 Unit4

Unit 4 Cyberspace一、单词拼写1. It is well known that smoking __________________ (影响) health.2. On the top of the hill, you can enjoy the beautiful __________________ (景色)of the city.3. Now many young men’s way of living is not __________________ (有规律的).4. My friend offered me some useful __________________ (建议)on this problem.5. The local __________________ (娱乐活动)are listed in the newspaper.6. This is not imagination, but __________________ (现实).7. His new novel is __________________ (吸引)a lot of attention.8. The discussion __________________ (集中)on three main problems.9. Luckily the child fell over but came to no __________________ (伤害).10. It’s a pity that he was __________________ (拒绝)by the company again.二、完成句子1. She spoke to me ____________________________________ (好像她认识我似的).2. I find it hard to ____________________________________ (很难与她取得联系).3. Wang Fang __________________ (作为……著名) a lawyer.4. Mr Black __________________ (和，并且) his three sons likes playing football.5. Now many people __________________ __________________ (感染了)A(H1N1).6. Unluckily, one of his fingers __________________ (切掉，切除)in an accident.7. __________________ (至今) I’ve understood everything the teacher’s said.8. What he had hoped at last __________________ (变为现实)after years.9. The price of the beef is ￥50 a kilogram __________________ (平均).10. At last, she found her skirt ____________________________________ (挂在衣服绳子上).三、单词拼写1. There was an unexpected explosion in our street, but our building wa sn’t __________________ (受损) at all.2. The __________________ (气候) of the world is especially unusual this year.3. I have been __________________ (拒绝) by all the universities I applied to.4. He fell into the water, much to the __________________ (娱乐) of the children.5. Lao Yang’s __________________ (建议) is that we turn the land into rice fields.6. The great increase in ______________ (旅游业) in recent years has resulted in the construction of many hotels.7. The university sent an e-mail to the chemist for those __________________ (科学的) materials.8. The children have made __________________ (安排) for the Christmas party.9. The tourists from France felt surprised at the __________________ (吸引力) of the Huangshan Mountain.10. The police arrested the__________________ (罪犯) in an abandoned factory.四、完成句子1. The judge believes that the suspect ________________ (很可能) to stay in the apartment at the time of crime.2. He talked about South Africa _________________________________ (好像他去过那里).3. Most of the people in the community find___________________________ (发现很难相处) well with the lady.4. Our destination __________________ (位于) in the center of the mountains.5. I realized that my dream would __________________ (实现) soon.6. In reality at pre sent you can buy what you want even if you don’t go to the street __________________ (亲自).7. When you grow up and work outside, you should always __________________ _______________(与你的父母保持联系).8. Rowan Atkinson, who ____________________________________Mr. Bean (以扮演Mr. Bean著称), one of the characters he has played, is very popular in Europe.9. Britain ____________________________________ (由……组成) three countries.10. — Shall we go shopping or watch TV at home? —____________________________________ (由你决定).五、句式填空1. It is+adj. +that-clause主语从句用形式主语it指代__________________ (很清楚, 很显然)we are going to see a huge growth in shopping on the Internet.2. What’s. . . up to? 此句型常用在口语中问某人在做什么—Hi Cathy. __________________ (你在做什么) this weekend?—Don’t ask, Tom . I have lots of work to do.3. have sth. done 过去分词作宾语补足语____________________________________ (有什么安排/计划) for Saturday and Sunday?4. not only… but also 不但……而且We would ___________________________________________________ (不但能够周游世界, 而且)go to study in any world famous universities we wanted to.5. more than…比……多Auckland is called “the city of sails” because it has __________________ (船比任何地方都多)in the world.六、单词拼写1. I must admit I've never found him particularly __________________ (有吸引力).2. The great increase in ______________ (旅游业)in recent years has resulted in the construction of many hotels.3. How long will it be before we get to the __________________ (目的地)?4. The man is a __________________ (罪犯). How could the people elect him to office?5. The local newspaper made __________________ (安排)for an interview with Professor Stein.6. The a__________________ of 3, 8 and 10 is7.7. There was an unexpected explosion in our street, but our building wasn't h__________________ at all.8. They are l__________________ to be fired by the company just because of their fault.9. Hats are in f__________________ again this year.10. Lao Yang's s__________________ is that we should turn the land into rice fields.2. He looks much younger but __________________ he is over fifty.3. He wants to visit the Great Wall but it hasn’t __________________yet.4. __________________ your study and you can do better.5. It’s time we took action to prevent accidents such as school bus __________________.6. What was it that __________________ his success?7. We should __________________ our future and carry on whatever happens.8. It looks __________________ it is going to snow.9. Lies also __________________ those who tell them.10. After he became famous, letters from all over the country __________________ every day.2. I didn’t __________________ meeting you here.3. We can get to our holiday __________________by plane.4. High heels are __________________ this year.5. We had reasons to __________________ but we accepted at last.6. Please __________________ with him in time.7. Football fans went to the airport to see Beckham __________________.8. What have you __________________ lately?9. We are busy making __________________ for Christmas.10. The price __________________ quality.九、根据汉语提示完成句子1. Four hundred people a year die of this disease__________________ (平均).2. At last the Smiths __________________ (定居)in the town.3. Mount Tai __________________ (位于)the middle of Shandong Province.4. From the top of the tower you can __________________ (看到好风景) of the city.5. I had no __________________ (正规教育).6. The offer __________________ (对……具有很大吸引力)us.7. New York __________________ (被公认为是) “Big Apple” in the United States.8. He learns to swim __________________ (也，而且) taking piano lessons.9. ____________________________________ (有一群人跟着他)，he felt a sense of achievement.10. The boss ordered him to __________________ (执行)the plan.十、完成句子1. Our team ____________________________________ (由……组成)15 members.2. Our water supply ___________________________ (已被中断/切断).3. The police __________________ (放弃)searching for the missing child.4. She ______________________________________________________ (每天花多达两个小时读英语).5. He ____________________________________ (一直盼望去英格兰)for a long time.6. He is always____________________________________ (第一个到校)in his class.7. His grandparents are British __________________ (按出身地).8. They have to __________________ (裁减)the office staff.9. I don’t know the reason why so few people __________________ (投票支持) her.十一、用所给词的正确形式填空1. Look at the dark clouds! It __________________ (rain).2. —Have you posted the letter for me? —Sorry, I forgot. I __________________ (post) it right away.3. The film __________________(end) at 8 o’clock. Then I __________________ (do) some shopping.4. He __________________ (fail) if he __________________ (keep)on working like this.5. The plane __________________ (take) off at 10: 10, that is, it __________________ (leave) in ten minutes.6. He _______________________________(leave), so I am afraid we can’t get together this weekend.7. He__________________ (take) a course this summer vacation.8. I don’t know if they __________________(come) here tonight. If they ________________(come), we __________________ (hold) a party to welcome them.9. The play _____________ (finish) very early and after that he is going to _____________ (visit) his old friends.10. —Have you bought me the book? —Sorry, I forgot. I __________________ (buy) it for you.十二、完成句子1. 带一把伞。

数学必修二第二章练习题

数学必修二第二章练习题数学必修二第二章通常涵盖了几何学的一些基础内容，包括平面几何、立体几何等。

以下是一些练习题，旨在帮助学生巩固第二章的学习内容。

练习题一：平面几何1. 已知三角形ABC中，角A为60度，边AB=5cm，边AC=7cm，求边BC 的长度。

2. 在矩形PQRS中，若PQ=4cm，PR=6cm，求对角线PS的长度。

3. 给定一个圆的半径为r，求圆的周长和面积。

解答提示：- 对于第一题，可以使用余弦定理来求解。

- 第二题可以通过勾股定理来求解对角线的长度。

- 第三题可以直接应用圆的周长公式C=2πr和面积公式A=πr²。

练习题二：立体几何1. 一个正方体的棱长为a，求其表面积和体积。

2. 已知一个圆柱的底面半径为r，高为h，求其侧面积和体积。

3. 如果一个圆锥的底面半径为r，高为h，求其体积。

解答提示：- 正方体的表面积公式为S=6a²，体积公式为V=a³。

- 圆柱的侧面积公式为A=2πrh，体积公式为V=πr²h。

- 圆锥的体积公式为V=1/3πr²h。

练习题三：空间几何1. 在空间直角坐标系中，已知点A(1,2,3)，B(4,-1,2)，求向量AB的模。

2. 给定两个平面的方程，求它们之间的夹角。

3. 已知一个点到两个平行平面的距离相等，求这两个平面之间的距离。

解答提示：- 第一题可以通过计算向量的坐标差来求得向量，然后使用向量的模长公式。

- 第二题和第三题可能需要使用向量法或平面法线之间的夹角来求解。

练习题四：几何证明1. 证明：在一个三角形中，大边对大角。

2. 证明：在一个直角三角形中，斜边的中线等于斜边的一半。

3. 证明：如果两个三角形的两边和夹角相等，则这两个三角形全等。

解答提示：- 第一题可以通过比较三角形两边的长度和对应的角来证明。

- 第二题可以通过构造直角三角形的中线，然后使用勾股定理来证明。

- 第三题是三角形全等的一个特例，可以通过SAS（边-角-边）全等条件来证明。

高中英语外研版必修第二册新高一必修二基础练习

高一必修二基础卷满分150分一、语法练习（1.5分每道，共34.5分）1. I _______asleep in the corner，for 1 remember nothing of what happened during the night．A．might fall B. must fall C．must have fallen D. can have fallen 2．I’m feeling sick．I_________so much chocolate．A．needn’t have eaten B. couldn’t have eatenC．mustn’t have eaten D．shouldn’t have eaten3. My wallet is nowhere to be found．I________when 1 was on the bus．A．must have dropped it B．must drop itC. should have dropped it D．ought to have dropped it 4．Mr. Green________my letter，otherwise he would have replied before now．A．must have received B．must have failed to receiveC．must receive D. must fail to receive5. You could have done much better yesterday．Why_________?A．didn’t you B．couldn’t you C. hadn’t you D．shouldn’t you 6．They stopped ____, but there was no more sound at all.A．to listen B．to hear C．listening D．to listen to7．She said that she felt someone ____ in the room.A．to smoke B．smokes C．smoked D．smoking8．I saw him ____ basketball with Jack an hour ago.A．plays B．to play C．played D．play9．We kept ____ the ball to each other, and they began to get angry.A．to pass B．passing C．pass D．past10．It's time for supper now. Let's ____ it.A．stop to have B．stop having C．to stop to have D．stopping to have11. At the seventh International Ballet Competitions, Fernando Bujones won the first gold medal ever to an American male dancer.A. awardedB. to be awardC. being awardedD. should be awarding12.The student, if well _____, will pass the examination without much difficulty.A. preparingB. preparedC. to prepareD. ready13. a little money, Jane was able to buy her mother a lovely new watch.A. To saveB. SavingC. SavedD. Having saved14. We saw new houses wherever we went on our visit.A. builtB. being builtC. buildingD. to build15.That gas pipeline project, in July 2002 and in 2005, will be China’s longest gas pipeline in history.A. starting; completingB. started; to be completedC. to start; completedD. starting; completed16.He isn't such a man ______he used to be.A. whoB. whomC. thatD. as17.He is good at English, ______we all know.A. thatB. asC. whomD. what18.Li Ming, ______to the concert enjoyed it very much.A. I went withB. with whom I wentC. with who I wentD.I went with him19.I don't like ______ as you read.A. the novelsB. the such novelsC. such novelsD. same novels20.He talked a lot about things and persons _______they remembered in the school.A. whichB. thatC. whomD. what21.The letter is from my sister, ______is working in Beijing.A. whichB. thatC. whomD. who22.In our factory there are 2,000 workers, two thirds of ____are women.A. themB. whichC. whomD. who23.You're the only person ______I've ever met ______could do it.A. who;/B./; whomC. whom;/D./; who二、单词（1分每词，共48分）honour 装饰物不管regard as定期的警告request 挥手吸引admitgoal 根据平衡回答r power die out 消失ache to one’s heart’s content 运动m 方面get across technique精力充沛的鼓掌on the edge of one’s seat极其e 安排（n.）完全的正常的终点以前的退出现金洲；大陆chain 信用卡大量车辆due to 把……作为目标大洋全部职员态度supply 减少数量contribute完形填空（1.5分每题，共30分）AFor a long time I saw happiness as a huge banner (旗帜) across the finish line of a long race.I felt that only when I__1__certain things could I finally be happy in my life. Most of the time I felt like a tortoise believing that being slow and__2__would win the race. At other times Iwould__3__like a rabbit trying different side roads at a dangerous __4__hoping to reach that banner a little faster.__5__，I began to see that no matter how long I raced towards it，the banner was never any__6__.I finally decided to__7__and take a break.It was then that I sawmy__8__sitting beside me.It had been with me as I__9__hard to support my family，as I played with my children and heard their__10__and even when I was __11__with my wife at my side looking after me.It had been with me as I raced towards that stupid banner. I just didn’t have the__12__to see it.There is an old Chinese proverb that says，“Tension is who you think you should be.__13__is who you are. “Perhaps we all should stop our race towards the__14__life we think we should have and __15__the life we have now. Happiness will never be found under some banner far away. It will be found__16__your own heart，soul and mind. It will be found when you__17__that others love you just as you do.Don’t be a tortoise or a rabbit when it comes to your happiness. Be a playful puppy and carry your stick of__18__with you everywhere you go.__19__yourself out of the race and realize that when it comes to love and happiness，you are__20__there.1.A.forgot B．missed C．overcame D．accomplished2．A. safe B．steady C．calm D．quiet3．A. act B．run C．jump D．walk4．A. place B．height C．speed D．time5．A. Generally B．Gradually C．Fortunately D．Firstly6．A. clearer B．lower C．closer D．smaller7．A. settle in B．start off C．stop by D．sit down8．A. happiness B．goal C．success D．friendship9．A. studied B．fought C．exercised D．worked10．A. laughter B. plaints C．stories D．breathing11. A. lonely B．tired C．sick D．hungry12．A. courage B．chance C．wisdom D．strength13．A. Stress B．Relaxation C．Failure D．Pain14．A. real B．perfect C.mon D．ordinary15．A. enjoy B．change C．improve D．create16．A. from B．on C．over D．in17．A. realize B．believe C．hope D．admit18．A. sorrow B．responsibility C．fortune D．joy19．A. Carry B．Make C．Push D．Take20.A.never B．still C．already D．ever阅读（2.5分每题，共37.5分）A.If you travel by air across the center of Africa or south .America , you fly over forests for thousands of kilometers .These great forests are the oceans of trees . There are full of thousands and thousands of different kinds of plants and animals .However , the worlds forests are getting smaller all the time . We are cutting down the trees because we need wood , and we need more farm land . Some people say that there will not be any forests like these in 20 or 30 years . what will happen if they disappear ?If we cut down our forests, a lot of plants and animals will disappear from the world . In a lot of places the new farm land will soon look like the old deserts . Crops will not grow there . It will not rain very often , and the weather will get very hot . Perhaps the climate of the world will change . This will be dangerous for everyone in the world . That is why we must take care of our forests .___1. The passage mainly tells us about ____ .A. the importance of taking care of our plantsB. the result of cutting down the treesC. the locations of great forestsD. the reasons for forming the deserts___2. Which of the following is true according to the passage ?A. Africa and South America are the oceans of trees .B. Forests are homes for different kinds of animals .C. Forests are usually several square kilometers largeD. Different plants can't be found in the same forest .___3. The need for more wood and more land results in ____ .A. the change of the world climateB. the disappearance of many plants and animalsC. more deserts and less farm land .D. all of the above___4. What will happen in 20 or 30 years in some people's view ?A. We'll have more and greater forests .B. We'll have enough land to support our people .C. We'll have no forests like those in the center of Africa .D. We'll have enough wood to do some cooking .___5. The writer thinks ____ .A. it dangerous for everyone to cut down the forestsB. it necessary for everyone to protect the forestsC. it important for everyone to take care of the worldD. it important for everyone to keep animalsGreenwich （格林威治）is on the River , five miles from the middle of London , and its history is two thousand years old . The first English people were fishermen there , and they named the place Greenwich , meaning "green village". Later the English kings and queens lived at Greenwich in their beautiful places .The name of the earliest palace was Placentia . Its windows were made of glass ---the first in England .Henry VIII lived there . He knew that England must be strong at sea . So he started two big ship-yards (船坞）at Greenwich ,and for 350 years the ships which were made there were the best in the world .But trouble was coming to Greenwich . In 1649 , a war started in England and for eleven years there was no king . The men who had worked for him at Placentia decided to live the place themselves . They sold all its beautiful things , and bought small pieces of the palace garden with money . Finally , the war ended and King Charles II came back . But Placentia was falling down . So King Charles built a new and bigger palace , which is now open to the public .At this time , Charles was worried about losing so many of its ships at sea : their sailors did not know how to tell exactly where they were . So in 1675 , Charles made John Flamsteed , the first astronomer (天文学家）in England , try to find the answer . Flamsteed worked in a new building on the high ground in Greenwich Park . From it with a telescope which he made himself , Flamsteed could look all round the sky . And he did , night after night , for twenty years . Carrying on Flamsteed's work a hundred years later , an astronomer called Harrison finally made a clock which told the time at sea , and helped sailors to know where they were .You can see Harrison's clock , still working , in Greenwich's museum of the sea . Because of Flamsteed's work , every country in the world now tells its time by Greenwich time .___45. The first English people living in the "green village" were _____ .A. sailorsB. fishermenC. King Charles and his familyD. The families of king and queens___46. Placentia was _____ palace in Greenwich .A. the biggestB. smallestC. the earliestD. the latest___67. What kind of trouble came to Greenwich in 1649 ?A. A war started in England.B. Placentia was destroyed .C. Ship-yards were built .D. King Henry died .___48. Charles made John Flamsteed try to find ______ .A. how to tell the timeB. hot to build shipsC. a way for sailors to tell their positions at seaD. a place to set up a telescope___49. Who made the first clock which could tell the time at sea ?A. HarrisonB. FlamsteedC. HenryD. Charles___50. Without Flamsteed's work ,it would be ___ for sailors to know where they were .A. impossibleB. possibleC. probableD. certainTed worked in a factory in a big town . He liked fishing very much , and was very good at it . Whenever he was free , he went to the small river behind the factory and tried to catch some fish , but there were very few there , because the river was polluted . Then one summer he went to the seaside during his holidays and stayed at a small cheap hotel ."I've never fished in the sea before , " he thought . " It will be rather different from fishing in out river ."On the first day he caught a lot of fish and was very happy . He gave them to the owner of the hotel , and he cooked them for all the guests , and they enjoyed them very much . After that , he did this every day . But when Ted got his bill (账单）at the end of the week , he saw on it :"For oil to cook fish ( 7 days) : $ 3.5 ."___11. In the first paragraph , the word " Polluted " means _____ .A. cleanB. deepC. dirtyD. wide___12. During the summer holidays one summer , Ted went to the seaside _____ .A. to stay a cheap hotelB. to catch fish for the ownerC. to cook fish for the guestsD. to fish in the sea___13. Ted gave the fish to the hotel for _____ .A. nothingB. moneyC. the guestD. the bill___14. When Ted got his bill , he felt _____ .A. expensiveB. surpriseC. cheapD. pleased___15. Which of the following is TRUE ?A. Ted went fishing every day when he worked in a factory .B. Ted didn't want to pay money for his staying at the hotel because the owner and the guests ate his fish .C. There were fewer fish in the river than in the sea .D. Ted thought it right for him to pay for the cook fish .答案完型1．解析：“我”觉得只有当“我”完成(accomplished)了某些事情后，最终在一生中“我”才是幸福的。

必修二点、直线、平面位置关系基础练习题

点、直线、平面之间位置关系基础练习题一、单选题1.在四面体ABCD中，AD=BC，且AD⊥BC，E，F分别为AB，CD的中点，则EF与BC所成的角为()A. 30°B. 45°C. 60°D. 90°2.已知m，n是两条不同的直线，α，β是两个不同的平面，下列说法中正确的是()A. 若m⊂α，n⊂β，m//n，则α//βB. 若m⊂α，n⊂β，α//β，则m//nC. 若m⊂α，n⊂β，α//β，且m，n共面，则m//nD. 若m//n，m//α，n//β，则α//β3.如图，已知△ABC为直角三角形，其中∠ACB=90°，M为AB的中点，PM垂直于△ABC所在平面，那么()A. PA=PB=PCB. PA≠PB≠PCC. PA=PB>PCD. PA=PB<PC第II卷（非选择题）二、解答题（本大题共14小题，共168.0分）4.如图，P是四边形ABCD所在平面外一点，四边形ABCD是∠DAB=60°，且边长为a的菱形．侧面PAD为正三角形，其所在平面垂直于底面ABCD．(1)若G为AD边的中点，求证：BG⊥平面PAD；(2)求证：AD⊥PB．5.如图，在三棱柱ABC−A1B1C1中，O为AB的中点，CA=CB，AB=AA1，∠BAA1=60∘．(1)证明：AB⊥平面A1OC;(2)若AB=CB=2，OA1⊥OC，求三棱锥A1−ABC的体积．6.如图，四边形ABCD是平行四边形，P是平面ABCD外一点，M，N分别是AB，PC的中点.求证：MN//平面PAD．7.如图所示，已知P是平行四边形ABCD所在平面外一点，M为PB的中点.求证：PD//平面MAC．8.如图，P为▱ABCD所在平面外的一点，M，N分别为AB，PD的中点.求证：MN//平面PBC．9.如图，在梯形ABCD中，AD//BC，AB⊥BC，AB=BC=1，PA⊥平面ABCD，CD⊥PC．(1)证明：CD⊥平面PAC；(2)若E为AD的中点，求证：CE//平面PAB．10.如图，在三棱锥P−ABC中，PA⊥AB，PA⊥BC，AB⊥BC，PA=AB=BC=2，D为线段AC的中点，E为线段PC上一点．(1)求证：平面BDE⊥平面PAC;(2)当PA//平面BDE时，求三棱锥E−BCD的体积．11.四棱锥P−ABCD中底面ABCD是矩形，M是PB的中点，PO⊥平面ABCD，AB=2,BC=1,PO=√3(1)求证：AB⊥平面PAD；(2)求三棱锥B−DMC的体积．12.如图，在四棱锥P−ABCD中，底面ABCD为平行四边形，点M为PC中点，且∠PAB=∠PDC=90°．(1)证明：PA//平面BDM；(2)证明：平面PAB⊥平面PAD．13.如图，在四棱锥P−ABCD中，E是PC的中点，底面ABCD为矩形，AB=2，AD=4，△PAD为正三角形，且平面PAD⊥平面ABCD，平面ABE与棱PD交于点F．(1)求证：EF//AB；(2)求三棱锥P−AEF的体积．14.如图，在四棱锥P−ABCD中，PD=2AD=4，PD⊥CD，PD⊥AD，底面ABCD为正方形，M，N分别为AD，PD的中点．(1)证明：PA//平面MNC；(2)求三棱锥P−MNC的体积．15.如图，在四棱锥P−ABCD中，底面为正方形，△PAD为等边三角形，平面PAD⊥平面PCD．(1)证明：平面PAD⊥平面ABCD：(2)若AB=2，Q为线段的中点，求三棱锥Q−PCD的体积．16.如图，在三棱锥V−ABC中，平面VAB⊥平面ABC，ΔVAB为等边三角形，AC⊥BC且AC=BC=√2，O，M分别为AB，VA的中点。

高一物理必修二第七章。功动能势能基础练习题(带参考答案)

高一物理必修二第七章。

功动能势能基础练习题(带参考答案)一、研究要点高一物理第七章功、动能、势能1.理解功的概念，掌握功的公式W=FScosθ，能够用这个公式进行计算。

2.理解正功和负功的概念，知道在什么情况下力做正功或负功。

3.知道几个力对物体所做的总功，以及总功的计算方法。

4.理解动能的概念，了解影响动能的因素。

5.理解势能的概念，了解重力势能的变化和重力做功的关系，知道重力做功与路径无关。

二、研究内容一）功的概念1.做功的要素是力和位移，功的表达式为W=FScosθ。

其中，θ为力与位移的夹角。

若0°≤θ＜90°，力对物体做正功；若θ=90°，力对物体不做功；若 90°＜θ≤180°，力对物体做负功，也叫物体做功。

2.功是一种量，功的正负号表示动力做功或阻力做功。

3.功的国际单位是XXX（J）。

4.总功的求解方法：1）先求出每一个力做的功，再求各个力做功的代数和，即为总功 W 总= ∑W i。

2）若物体所受力均为XXX，先求物体所受力的合力，再求总功 W 总 = F net s。

问题1：如何求功？如何理解正、负功？例1、如图1所示，一个物块在与水平方向成α 角的XXX F 作用下，沿水平面向右运动一段距离 s，在此过程中，XXX F 对物块所做的功为（）A．Fs cos α B．Fs sin α C．Fs sin α cos α D．Fs cos α练1、如图2所示，一个质量为 m=150kg 的雪橇，受到与水平方向成θ=37° 角斜向上的拉力 F=500N 作用，在水平面上移动了距离 s=5m。

雪橇与地面间的滑动摩擦力 f=100N。

求各力对物体做的功。

问题2：功的正负如何判断？例2、一人乘电梯从 1 楼到 30 楼，在此过程中经历了先加速，后匀速，再减速的运动过程。

电梯支持力对人做功的情况是（）A．加速时做正功，匀速时不做功，减速时做负功B．加速时做正功，匀速和减速时做负功C．加速和匀速时做正功，减速时做负功D．始终做正功练2、地球在万有引力作用下绕太阳的运动轨道是椭圆，当地球从近日点向远日点运动的过程中（）A．万有引力对地球做正功B．万有引力对地球做负功C．万有引力对地球不做功D．有时做正功，有时做负功点评：判断功的正负，应从功的定义出发。

(必考题)初中高中化学必修二第七章《有机化合物》基础练习(答案解析)

一、选择题1．化学与工农业生产、生活密切相关，下列说法中正确的是A ．在葡萄酒中添加微量二氧化硫作抗氧化剂，使酒保持良好品质B ．糖类、油脂和蛋白质都属于天然高分子有机物C ．胶体与溶液的本质区别是丁达尔效应D ．酸雨是指pH ＜7的降水，主要是由化石燃料燃烧产生的二氧化硫和氮氧化物造成2．某有机物的结构简式如图所示，下列各项性质中，它不可能具有的是（）①可以燃烧②能使酸性高锰酸钾溶液褪色③能与NaOH 溶液反应④能发生酯化反应⑤能发生聚合反应⑥能发生水解反应⑦能发生取代反应A ．①④B ．⑥C ．⑤D ．④⑤3．下列有关化学用语表示正确的是（）A ．3NH 分子的结构模型：B ．3Al 的结构示意图：C ．次氯酸钠的电子式：Na :O :Cl :D ．HClO 的结构式：H —Cl —O 4．分子结构丰富多样。

下列分子呈正四面体结构的是A ．乙醇B ．乙烯C ．甲烷D ．乙酸5．医用一次性口罩的结构如图所示，过滤层所用的材料是聚丙烯，具有阻隔病毒和细菌的作用。

下列有关说法不正确的是A ．该口罩是一种混合物B ．聚丙烯难溶于水C ．该口罩用完后不应随意丢弃D ．用“84”消毒液清洗该口罩上的污溃后可继续使用 6．室温下，下列各组微粒在指定溶液中能大量共存的是（）A ．pH=1的无色溶液中：CH 3CH 2OH 、Cr 2O 2-7、K ＋、SO 2-4B ．c （Ca 2＋）=0.1mol·L －1的溶液中：NH +4、SO 2-3、Cl －、Br － C ．含大量HCO -3的溶液中：C 6H 5O －、CO 2-3、Br －、K ＋D ．能使甲基橙变为橙色的溶液：Na ＋、NH +4、CO 2-3、Cl － 7．生活中的一些问题常常涉及到化学知识。

下列叙述中不正确的是A ．糯米中的淀粉一经水解，就酿成了酒B ．将米饭在嘴里咀嚼有甜味，是因为部分淀粉在唾液酶催化下水解生成麦芽糖C．棉花的主要成分是纤维素D．未成熟的苹果遇碘水会变蓝8．下列由实验得出的结论正确的是选项实验结论A 将石蜡油蒸气依次通过加热的内含碎瓷片的玻璃管、盛有酸性高锰酸钾溶液的洗气瓶，高锰酸钾溶液褪色石蜡油中含有不饱和键的烃B 将胆矾晶体悬挂于盛有浓H2SO4的密闭试管中，蓝色晶体逐渐变为白色浓H2SO4具有吸水性C 将硫酸酸化的双氧水滴入硝酸亚铁溶液中，溶液黄色H2O2的氧化性比Fe3+强D 向蔗糖溶液中加入稀硫酸，水浴加热一段时间后，再加入新制 Cu(OH)2悬浊液，用酒精灯加热，未见砖红色沉淀蔗糖未水解A．A B．B C．C D．D9．下列说法不正确．．．的是A．臭氧是饮用水的理想消毒剂之一，因为它杀菌能力强且不影响水质B．在食品包装袋内放入铁系保鲜剂可以防止食品因氧化而变质C．因铝制品表面有致密的氧化膜保护层，故可长时间盛放咸菜等腌制食品D．工业上，二氧化硫可用于漂白纸浆以及草帽等编织物10．下列关于维生素C的说法不正确的是（）A．也称为抗坏血酸B．难溶于水C．是一种较强的还原剂D．人体不能合成维生素C，必须从食物中获得二、填空题11．下列四种有机物中：A．CH4 B．CH2=CH2 C．苯 D．CH3COOH(1)能使酸性KMnO4溶液褪色的是_____(填编号，下同)；(2)实验室常用乙醇、浓硫酸和_____制备乙酸乙酯，并写出该反应的化学反应方程式_________。

(人教版)宁波高中化学必修二第七章《有机化合物》基础练习

一、选择题1．下列说法不正确的是A．蛋白质遇到双缩脲试剂会呈现紫玫瑰色B．可通过控制溶液的pH分离氨基酸C．将纤维素溶解在铜氨溶液中，将形成的溶液压入稀硫酸中，取出生成物用水洗涤重新得到蓝色的铜氨纤维D．物证技术中常用茚三酮显现指纹2．等物质的量的下列有机物完全燃烧，消耗O2最多的是A．C6H6B．CH3CH2OH C．C2H4D．CH3COOH3．通过测定血液或尿液中某物质的含量可诊断糖尿病患者的病情，该物质为（）A．蛋白质B．葡萄糖C．淀粉D．油脂4．下列物质的化学用语表达正确的是A．甲烷的球棍模型：B．33(CH)COH的名称：2，2-二甲基乙醇C．乙醛的结构式：3CH CHOD．羟基的电子式：·····O:H5．新冠肺炎疫情出现以来，一系列举措体现了中国力量。

其中，化学知识起了重要作用，下列有关说法错误的是A．医用酒精中乙醇的体积分数为75%，能用于杀菌消毒是因为它可使蛋白质发生变性B．新冠病毒直径大约在60~140nm，扩散到空气中不可能形成胶体C．医用口罩由三层无纺布制成，无纺布的主要原料聚丙烯树脂属于有机高分子材料D．医用防护服的核心材料是微孔聚四氟乙烯薄膜，其单体四氟乙烯属于卤代烃6．下列实验方案能达到目的的是A．用浓硫酸干燥NH3B．用焰色反应鉴别KCl和K2SO4C．用NaOH溶液除去Cl2中的HCl D．用灼烧闻气味的方法鉴别棉线和羊毛线7．下列由实验得出的结论正确的是选项实验结论A 将石蜡油蒸气依次通过加热的内含碎瓷片的玻璃管、盛有酸性高锰酸钾溶液的洗气瓶，高锰酸钾溶液褪色石蜡油中含有不饱和键的烃B 将胆矾晶体悬挂于盛有浓H2SO4的密闭试管中，蓝色晶体逐渐变为白色浓H2SO4具有吸水性C 将硫酸酸化的双氧水滴入硝酸亚铁溶液中，溶液黄色H 2O 2的氧化性比Fe 3+强D 向蔗糖溶液中加入稀硫酸，水浴加热一段时间后，再加入新制 Cu(OH)2 悬浊液，用酒精灯加热，未见砖红色沉淀蔗糖未水解A ．AB ．BC ．CD ．D8．下列关于有机物的说法中，正确的是A ．等质量的苯、甲苯、乙烯、甲烷分别在足量氧气中完全燃烧时，消耗氧气物质的量最多的是甲苯B ．纤维素−−−→水解葡萄糖→氧化CO 2和H 2O(释放能量维持生命活动) C ．光照条件下，控制CH 4和Cl 2的比例为1∶1，能够制得纯净的CH 3Cl 和HCl D ．石油裂解与裂化的原理相同、目的不同9．2019年12月以来，我国部分地区突发的新冠病毒肺炎威胁着人们的身体健康。

高中化学必修二第五章《化工生产中的重要非金属元素》基础练习(培优练)

一、选择题1．无色的混合气体甲。

可能含有NO 、CO 2、 NO 2、NH 3、N 2中的某几种。

将100mL 气体经过如下图的实验处理，结果得到酸性溶液，而几乎无气体剩余。

则甲气体的组成为A ．NH 3、NO 2、N 2B ．NH 3、NO 2、CO 2C ．NH 3、NO 、CO 2D ．NO 、CO 2、N 22．无色的混合气体甲，可能含NO 、CO 2、NO 2、NH 3、O 2、N 2中的几种，将100mL 甲气体经过如图实验的处理，结果得到酸性溶液，而几乎无气体剩余，则甲气体的组成为A ．NH 3、NO 、O 2B ．NH 3、NO 、CO 2C ．NH 3、NO 2、CO 2D ．NO 、CO 2、N 23．如图所示，相同条件下，两个容积相同的试管分别装满2NO (不考虑反应2242NO N O )和NO 气体，分别倒置于水槽中，然后通过导管缓慢通入氧气，边通边慢慢摇动试管，直到两个试管内充满液体。

假设试管内的溶质不向水槽中扩散，则两个试管内溶液物质的量浓度之比为A ．1：1B ．5：7C ．7：5D ．4：34．下列各组物质，不满足组内任意两种物质在一定条件下均能发生反应的是（）甲乙丙 A ()()32Fe NO aq ()32NH H O aq ⋅()3HNO aq B NaOH(aq) ()3NaHCO aq()24H SO aq C ()2SiO sC(s) ()2H O g D ()2Cl g ()3FeBr aqNaI(aq) A ．A B ．B C ．C D ．D5．下列化合物能由两种单质直接化合生成的是A ．FeCl 2B ．NO 2C ．CuSD ．SO 26．近年来在中国汽车的销量大幅增长的同时也带来了严重的空气污染。

汽车尾气处理装置中，气体在催化剂表面吸附与解吸的过程如图所示，下列说法正确的是A ．汽车尾气的主要污染成分包括CO 、NO 和N 2B ．反应中NO 为氧化剂，N 2为氧化产物C ．NO 和O 2必须在催化剂表面才能反应D ．催化转化总反应为222催化剂2NO+O +4CO 4CO +N7．对于某些离子的检验及结论一定正确的是A ．向某溶液中滴加紫色石蕊试液，溶液变红，原溶液一定是酸。

高中化学必修二练习题(打印版)

高中化学必修二练习题（打印版）### 高中化学必修二练习题#### 一、选择题1. 下列化合物中，属于共价化合物的是（）A. NaClB. HClC. CaOD. MgO2. 根据题目分析，下列反应中属于氧化还原反应的是（）A. 2H2O + 2e⁻ → H2 + 2OH⁻B. 2H2 + O2 → 2H2OC. 2H2O → 2H2 + O2D. CO2 + Ca(OH)2 → CaCO3 + H2O3. 根据题目分析，下列物质中，属于电解质的是（）A. 蒸馏水B. 食盐水C. 硫酸D. 酒精4. 下列反应中，属于吸热反应的是（）A. 燃烧反应B. 金属与酸反应C. 铵盐与碱反应D. 铵盐与水反应5. 根据题目分析，下列物质中，属于强酸的是（）A. 醋酸B. 硫酸C. 碳酸D. 磷酸#### 二、填空题1. 请写出下列反应的化学方程式：- 铁与稀硫酸反应：____________________- 碳酸钙与盐酸反应：____________________- 氢氧化钠与盐酸中和反应：____________________2. 根据题目分析，下列物质的化学名称分别是：- NaOH：____________________- CaCO3：____________________- H2SO4：_____________________3. 请根据题目分析，写出下列物质的化学式：- 氧化铁：____________________- 氢氧化钠：____________________- 硫酸铜：_____________________#### 三、简答题1. 请简述什么是氧化还原反应，并给出一个例子。

2. 请解释什么是酸碱中和反应，并说明其反应原理。

3. 请描述什么是电解质，并给出一个例子。

#### 四、计算题1. 已知某硫酸溶液的浓度为10%，求100g该硫酸溶液中硫酸的质量。

2. 某化学反应的化学方程式为：2A + B → 3C + D，若已知反应物A 的摩尔质量为24g/mol，B的摩尔质量为32g/mol，求生成物C的摩尔质量，假设生成物D的质量忽略不计。