高三一段边缘生专练(4)a

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人教版2022届高三英语一轮复习练习：必修一 Unit 4 课下练熟高考 Word版含答案

Unit 4 课下练熟高考练(一)英语学问运用·组块专练——练准度(限时：30分钟)Ⅰ.完形填空(2021·宁夏银川一中一模)When I was eighteen, I couldn't wait to get my first job, which meant I made the first step toward adulthood.But it was difficult to get a work permit. One day I was dropped off by my parents at the __1__，where applicants took their physical tests for work permits. Although I had night blindness, my vision was clearer during the day, which helped me walk __2__ by myself. Then the doctor began the __3__. He looked into my eyes with a bright light. “I suggest your parents take you to an eye specialist，” he said，“I __4__ you have a retinal (视网膜) disease. If you do, you'll never __5__ a day in your life ...”My parents did take me to specialists. After much time and money spent seeking an __6__ result, it was determined that I had an eye disease that slowly __7__ a person of sight. But still, during daylight, I could walk without __8__. I could read, but not for hours. My eyes began to __9__ and words slipped off the page when I read more than a few pages. However, no matter how tired my eyes became, I never gave up reading. I knew the __10__ of great writers as well as the most popular music stars. Their words were powerful, which __11__ me to try writing. Soon writing brought me a lot of __12__ each time I completed a paper.Then an important phone call from an editor changed my life. An article I __13__ appeared in a local newspaper. The newspaper, to my __14__，continued to print my work. Next, a book series published several of my essays. I got interested in writing and __15__ up with each acceptance. On the pages, readers never knew of my blindness __16__ I chose to present it. For me, finding my voice through writing gave me the pride and satisfaction I __17__ so many years ago. Now, I have numerous essays and articles in __18__.Should I be thanking that misguided doctor? By falsely predicting that I could never work a day, he fueled my __19__ into success. He set the bar too __20__ and focused on what I wouldn't be able to do. Yet I proved what I could do.语篇解读：本文是一篇记叙文。

高优指导(全国通用)高考英语一轮复习考点规范练4 Unit 4 Earthquakes 新人教版必修1

考点规范练4(必修1 Unit 4)Ⅰ.阅读理解AThough larger cities were mostly spared,Sunday’s tornadoes damaged some small towns in the middle of the U.S.One of the hardest hit was Van,Texas,a town of about 2,600 people located 70 miles southeast of Dallas.Winds there reached up to 140 miles per hour and damaged about 30 percent of the area.Weather experts say it was the strongest tornado to hit the town during more than 70 years.Emergency workers in Van moved quickly to help those affected,but two people were killed and m ore than two dozen were injured by the tornado’s winds.A driver in the nearby town of Corsicana was killed by floodwaters that had risen after the storm.In Lake City,Iowa,a tornado tore the roof off South Central Calhoun High School.One hundred and fifty people had gathered in the safety of the school’s basement,and all escaped without major harm.Nine people were injured in the 130-mph winds of a tornado that touched down in Delmont,South Dakota,but tornadoes weren’t the only severe weather that state saw on Sunday.Residents in the Black Hills region were faced with a late-spring snowfall of 10 to 18 inches.Scientists measure tornadoes using the Enhanced Fujita(EF) Scale.It categorizes tornadoes based on the amount of damage they cause and their estimated wind speed.EF1 tornadoes are the weakest,while EF5 tornadoes are the severest.The tornado in Van was categorized as an EF3.Although tornadoes can happen in any state,they are most common in the central U.S.This is why that part of the country is nicknamed(给……起绰号) TornadoAlley.Though this past weekend’s storms were damaging,they were not abnormal forthis time of year.More tornadoes hit the U.S.in May than in any other month,according to the National Weather Service(NWS).“We’ve had at least one tornado r eported somewhere in the nation every day since May 2,”weather expert Greg Carbin said.“It’s a dangerous time of year.”1.Which part of the U.S.was hit by tornadoes on Sunday?A.The central part.B.The eastern part.C.The western part.D.The southern part.2.What happened to people in South Central Calhoun High School?A.They were killed by floodwaters.B.They survived the tornado luckily.C.They were badly hurt by the storm.D.They were not influenced by the tornado.3.Which tornadoes are the strongest?A.EF1 tornadoes.B.EF3 tornadoes.C.EF4 tornadoes.D.EF5 tornadoes.4.The nickname Tornado Alley is connected with .A.a weather expertB.the area’s climateC.the area’s landformD.the creation of the EF ScaleBTo the woman and child who sat at table 9,My name is Tony Posnanski.I am the manager of the restaurant you came into a few weeks ago.I was asked to talk to a table close to yours.I did and they said yourchild was being very loud.I heard some yelling while I was talking to that table.When I g ot to your table,you looked at me and said,“Do you know what it is like to have a child with autism(自闭症)?”You were not rude when you asked thequestion.In fact,you were quite sincere.In 15 years I do not have a lot of memorable moments as a restaurantmanager.However,I do remember everything about the day my son was born and the day I married my wife.I know what I was supposed to say when I went to your table.But I did not do any of that.Instead I just told you I hoped your meal was awesome and that your meal was on me tonight.I do not think the other guests I spoke to were happy about it,but Ididn’t tell them what you said to me.You asked me a question that I did not answer.The truth is I do not know what it is like to have a child with autism.However,I know what it is like to be a father.I know what it is like to want to spend more time with his children.Honestly,I wrote this to you and your beautiful daughter because I wanted tothank you both.You have given me a great restaurant memory.You also taught me a valuablelesson.Sometimes doing the right thing does not make everyone happy;just the people who need it the most.Sincerely,Tony Posnanski5.What happened in the restaurant the other day?A.Some guests complained about the food.B.The woman’s da ughter yelled at others.C.The woman made a sincere apology.D.Tony paid the meal for the woman.6.What was Tony supposed to say when he went to table 9?A.Would you please keep your child quiet?B.What do you think about our dishes?C.What’s wrong with yo ur daughter?D.Is there anything I can do for you?7.Tony wrote the letter to .A.answer the woman’s questionB.show his sympathy for the womanC.express his gratitude to the womanD.share his feelings about being a parent8.The underlined word “it” in the last paragraph refers to .A.a great memoryB.a valuable lessonC.the right thingD.the deep happinessⅡ.七选五How to Motivate Teens to ReadWith lots of studies showing the benefits of reading,how can teachers motivate their students to open a good book or power up their e-reader?Lead by ExampleRequire students to spend at least 20 minutes in independent reading every day.By taking part in this regular activity themselves,teachers show that they consider reading very important.1.Freedom to Choose2. For those who forget their books,provide them with access tonovels,magazines or newspapers during required reading time.Consider allowingstudents to use their personal e-readers.Share Your ExcitementTeachers’ excitement for a particular book may have a huge influence on their students.3. Then when it comes time for them to choose a new book,suggest your favorite.Visit the LibraryMake time to visit the school library and require students to borrow at least one book of interest.4. By doing so,they can make sure the book fits their interests.Stay InformedTeachers can help motivate students by finding out the latest popular young adult reading matter,such as “The Hunger Games” by Suzanne Collins and the “Uglies” by Scott Westerfeld.With varied activities competing for students’ time and attention,it can be difficult to encourage youngsters to read.5.Teachers who make independent reading a daily part of the classroom experienceand find creative ways to motivate their students may be on the way to writing a success story.A.They can read books in silence.B.Give students a taste of what the book is about.C.There is science fiction that they are interested in.D.Encourage them to spend some time reading the book before borrowing.E.Howe ver,there is little doubt that reading can help with students’ studies.F.Therefore,they always find time to read even though they are terribly busy.G.Allow students to pick their own literature,as long as it is suitable for school reading.〚导学号95480036〛Ⅲ.书面表达史上最严的禁烟令自2015年6月1日起在北京实施。

【高优指导】(全国通用)2021高考英语一轮复习考点规范练4Unit4Earthquakes新人教版

【高优指导】（全国通用）2021高考英语一轮复习考点规范练4Unit4Earthquakes新人教版必修1Ⅰ.阅读明白得AThough larger cities were mostly spared,Sunday’s tornadoes damaged some small towns in the middle of the U.S.One of the hardest hit was Van,Texas,a town of about 2,600 people located 70 miles southeast of Dallas.Winds there reached up to 140 miles per hour and damaged about 30 percent of the area.Weather experts say it was the strongest tornado to hit the town during more than 70 years.Emergency workers in Van moved quickly to help those affected,but two people were killed and more than two dozen were injured by the tornado’s winds.A driver in the nearby town of Corsicana was killed by floodwaters that had risen after the storm.In Lake City,Iowa,a tornado tore the roof off South Central Calhoun High School.One hundred and fifty people had gathered in the safety of the school’s basement,and all escaped without major harm.Nine people were injured in the 130-mph winds of a tornado that touched down in Delmont,South Dakota,but tornadoes weren’t th e only severe weather that state saw on Sunday.Residents in the Black Hills region were faced with a late-spring snowfall of 10 to 18 inches.Scientists measure tornadoes using the Enhanced Fujita(EF) Scale.It categorizes tornadoes based on the amount of damage they cause and their estimated wind speed.EF1 tornadoes are the weakest,while EF5 tornadoes are the severest.The tornado in Van was categorized as an EF3.Although tornadoes can happen in any state,they are most common in the central U.S.This is why that part of the country is nicknamed(给……起外号) TornadoAlley.Though this past weekend’s storms were damaging,they were not abnormal forthis time of year.More tornadoes hit the U.S.in May than in any other month,according to the National Weather Service(NWS).“We’ve had at least one tornado reported somewhere in the nation every day since May 2,”weather expert Greg Carbin said.“It’s a dangerous time of year.”1.Which part of the U.S.was hit by tornadoes on Sunday?A.The central part.B.The eastern part.C.The western part.D.The southern part.2.What happened to people in South Central Calhoun High School?A.They were killed by floodwaters.B.They survived the tornado luckily.C.They were badly hurt by the storm.D.They were not influenced by the tornado.3.Which tornadoes are the strongest?A.EF1 tornadoes.B.EF3 tornadoes.C.EF4 tornadoes.D.EF5 tornadoes.4.The nickname Tornado Alley is connected with .A.a weather expertB.the area’s climateC.the area’s landformD.the creation of the EF ScaleBTo the woman and child who sat at table 9,My name is Tony Posnanski.I am the manager of the restaurant you came into a few weeks ago.I was asked to talk to a table close to yours.I did and they said yourchild was being very loud.I heard some yelling while I was talking to that table.When I got to your table,you looked at me and said,“Do you know what it is like to have a child with autism(自闭症)?”You were not rude when you asked thequestion.In fact,you were quite sincere.In 15 years I do not have a lot of memorable moments as a restaurantmanager.However,I do remember everything about the day my son was born and the day I married my wife.I know what I was supposed to say when I went to your table.But I did not do any of that.Instead I just told you I hoped your meal was awesome and that your meal was on me tonight.I do not think the other guests I spoke to were happy about it,but Ididn’t tell them what you said to me.You asked me a question that I did not answer.The truth is I do not know what it is like to have a child with autism.However,I know what it is like to be a father.I know what it is like to want to spend more time with his children.Honestly,I wrote this to you and your beautiful daughter because I wanted tothank you both.You have given me a great restaurant memory.You also taught me a valuablelesson.Sometimes doing the right thing does not make everyone happy;just the people who need it the most.Sincerely,Tony Posnanski5.What happened in the restaurant the other day?A.Some guests complained about the food.B.The woman’s daughter yelled at others.C.The woman made a sincere apology.D.Tony paid the meal for the woman.6.What was Tony supposed to say when he went to table 9?A.Would you please keep your child quiet?B.What do you think about our dishes?C.What’s wrong with your daughter?D.Is there anything I can do for you?7.Tony wrote the letter to .A.answer the woman’s questionB.show his sympathy for the womanC.express his gratitude to the womanD.share his feelings about being a parent8.The underlined word “it” in the last paragraph refers to .A.a great memoryB.a valuable lessonC.the right thingD.the deep happinessⅡ.七选五How to Motivate Teens to ReadWith lots of studies showing the benefits of reading,how can teachers motivate their students to open a good book or power up their e-reader?Lead by ExampleRequire students to spend at least 20 minutes in independent reading every day.By taking part in this regular activity themselves,teachers show that they consider reading very important.1.Freedom to Choose2. For those who forget their books,provide them with access tonovels,magazines or newspapers during required reading time.Consider allowingstudents to use their personal e-readers.Share Your ExcitementTeache rs’ excitement for a particular book may have a huge influence on their students.3. Then when it comes time for them to choose a new book,suggest your favorite.Visit the LibraryMake time to visit the school library and require students to borrow at least one book of interest.4. By doing so,they can make sure the book fits their interests.Stay InformedTeachers can help motivate students by finding out the latest popular young adult reading matter,such as “The Hunger Games” by Suzanne Collins and the“Uglies” by Scott Westerfeld.With varied activities competing for students’ time and attention,it can be difficult to encourage youngsters to read.5.Teachers who make independent reading a daily part of the classroom experienceand find creative ways to motivate their students may be on the way to writing a success story.A.They can read books in silence.B.Give students a taste of what the book is about.C.There is science fiction that they are interested in.D.Encourage them to spend some time reading the book before borrowing.E.However,there is little doubt that reading can help with students’ studies.F.Therefore,they always find time to read even though they are terribly busy.G.Allow students to pick their own literature,as long as it is suitable for school reading.〚导学号95480036〛Ⅲ.书面表达史上最严的禁烟令悠闲2015年6月1日起北京实施。

高考化学微专题小练习专练41盐类水解离子浓度的比较

专练41 盐类水解、离子浓度的比较1．[2021·福建卷]下图为某实验测得0.1 mol ·L －1NaHCO 3溶液在升温过程中(不考虑水挥发)的pH 变化曲线。

下列说法正确的是( )A ．a 点溶液的c (OH －)比c 点溶液的小 B ．a 点时，K w <K a1(H 2CO 3)·K a2(H 2CO 3)C ．b 点溶液中，c (Na ＋)＝c (HCO －3 )＋2c (CO 2－3 )D ．ab 段，pH 减小说明升温抑制了HCO －3 的水解2．[2021·河北卷]BiOCl 是一种具有珍珠光泽的材料，利用金属Bi 制备BiOCl 的工艺流程如图：下列说法错误的是( )A ．酸浸工序中分次加入稀HNO 3可降低反应剧烈程度B ．转化工序中加入稀HCl 可抑制生成BiONO 3C ．水解工序中加入少量CH 3COONa(s)可提高Bi 3＋水解程度 D ．水解工序中加入少量NH 4NO 3(s)有利于BiOCl 的生成 3．[2021·北京卷]下列实验中，均产生白色沉淀。

下列分析不正确的是( )A ．Na 2CO 3与NaHCO 3溶液中所含微粒种类相同B ．CaCl 2能促进Na 2CO 3、NaHCO 3水解C ．Al 2(SO 4)3能促进Na 2CO 3、NaHCO 3水解D ．4个实验中，溶液滴入后，试管中溶液pH 均降低4．[2021·广东卷]鸟嘌呤(G)是一种有机弱碱，可与盐酸反应生成盐酸盐(用GHCl 表示)。

已知GHCl 水溶液呈酸性，下列叙述正确的是( )A ．0.001 mol ·L －1GHCl 水溶液的pH ＝3B ．0.001 mol ·L －1 GHCl 水溶液加水稀释，pH 升高C ．GHCl 在水中的电离方程式为GHCl===G ＋HClD ．GHCl 水溶液中：c (OH －)＋c (Cl －)＝c (GH ＋)＋c (G)5．[2022·广东中山纪念中学联考]化学是人类进步的阶梯，下列有关化学应用的说法正确的是( )A ．BaCO 3难溶于水，可以用作钡餐B ．草木灰(含K 2CO 3)不宜与铵态氮肥混合使用C ．防控新冠肺炎期间，将84消毒液和洁厕净混合使用以增强杀菌消毒效果D ．Al 2(SO 4)3溶液与Na 2CO 3溶液可双水解产生Al(OH)3沉淀，常用来制备泡沫灭火剂 6．[2022·广东深圳高中阶段测试] 在某温度时，将n mol ·L －1氨水滴入10 mL 1.0 mol ·L－1盐酸中，溶液pH 和温度随加入氨水体积变化曲线如图所示。

高考高三11月内部特供卷地理(四)学生版

-------------------------天才是百分之一的灵感加百分之九十九的勤奋------------------------------金戈铁骑 2019－2020学年11月份内部特供卷高三地理（四）注意事项：1．答题前，先将自己的姓名、准考证号填写在试题卷和答题卡上，并将准考证号条形码粘贴在答题卡上的指定位置。

2．选择题的作答：每小题选出答案后，用2B 铅笔把答题卡上对应题目的答案标号涂黑，写在试题卷、草稿纸和答题卡上的非答题区域均无效。

3．非选择题的作答：用签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、草稿纸和答题卡上的非答题区域均无效。

4．考试结束后，请将本试题卷和答题卡一并上交。

第Ⅰ卷（选择题）本卷共11个小题，每小题4分，共44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。

下图经纬网示意图中A 、B 两地相距33.3厘米，地方时相差4小时。

回答下列各题。

1．有关该图比例尺的叙述，正确的是A.AB 段的比例尺为1：10000000B.BD 段的比例尺大于AB 段C.图上比例尺到处都一样D.CD 段的比例尺比AB 段大2倍2．从B 到A 点，距离最短的走法可能是A.从B 点向东至A 点B.先向西北，再转向西南C.先向东北，再转向东南D.先向东南，再转向东北下图为某地某日两个不同时刻太阳光线与地面的夹角，据此回答下面小题。

3．该地可能是A ．冰岛B ．格陵兰岛C ．火地岛D ．南极半岛 4．若太阳光线处在a 位置时，国际标准时间为20时，则该地的经度是 A ．60°E B ．0° C ．120°W D ．180° 5．此时，可能出现的地理现象是 A ．我国华北平原上正播种小麦 B ．北极圈内出现极昼现象 C ．地球公转速度在加快 D ．南极极夜范围在扩大企业养老保险是国家规定的企业必须为本企业职工缴纳的一种保险。

企业养老保险抚养比是参保职工人数与领取养老保险待遇人数的比值。

人教版高三化学总复习练习：第四章非金属及其化合物4-4-4a(基础小题快练)含解析(1)(1)

人教版高三化学总复习练习：第四章非金属及其化合物4-4-4a（基础小题快练）含解析(1)(1)1．下列关于化学与生产、生活的认识不正确的是( )A．CO2、CH4、N2等均是造成温室效应的气体B．使用清洁能源是防止酸雨发生的重要措施之一C．节能减排符合低碳经济的要求D．合理开发利用可燃冰(固态甲烷水合物)有助于缓解能源紧缺解析：A项，N2不是造成温室效应的气体，故不正确；使用清洁能源、节能减排、合理开发利用能源都符合化学与可持续发展的要求，故B、C、D都正确。

答案：A2．每年冬季我国北方大部分地区持续出现大雾，对交通出行、身体健康等方面造成很多不便，这为我国大气环境保护敲响了警钟。

关于空气污染，下列说法正确的是( )A．二氧化硫、二氧化氮、一氧化碳和二氧化碳是大气主要污染物B．正常雨水的pH等于7C．二氧化硫和二氧化氮是引起酸雨的主要气体D．秸秆焚烧总体来说对庄稼是有益的，值得提倡解析：二氧化碳不属于大气污染物，它是引起温室效应的主要气体，A选项错误；正常雨水中因为溶有二氧化碳而显酸性，B选项错误；二氧化硫可以形成硫酸型酸雨，二氧化氮可以形成硝酸型酸雨，C选项正确；秸秆焚烧不但引起空气污染，还破坏了土壤的结构，造成农田质量下降，并容易引起火灾，引发交通事故，必须禁止，D选项错误。

答案：C3．下表中的污染与其来源不对应的是( )解析：塑料在自然界很难被分解，从而容易造成白色污染，A正确；化石燃料燃烧容易产生大量颗粒物，从而容易造成PM2.5污染，B正确；汽车尾气中含有氮氧化物从而导致环境污染，C正确；水体富营养化主要是由水中氮、磷含量升高导致的，D不正确。

答案：D4．如图为雾霾的主要成分示意图。

下列说法错误的是( )A．SO2、NxOy都属于酸性氧化物B．碳氢化合物可引起光化学烟雾C．重金属离子可导致蛋白质变性D．汽车尾气的大量排放是造成雾霾天气的人为因素之一解析：能与碱反应生成盐和水的氧化物是酸性氧化物，NO、NO2不是酸性氧化物，A错误；碳氢化合物可引起光化学烟雾，B正确；重金属盐能使蛋白质变性，C 正确；汽车尾气的大量排放是造成雾霾天气的人为因素之一，D正确。

人教版高三化学总复习练习：第四章非金属及其化合物 4-4-2a(基础小题快练)含解析.doc

一、氨与铵盐的性质及应用1．关于氨的下列叙述中，错误的是()A．氨易液化，因此可用来作制冷剂B．氨溶解于水显弱碱性，因此可使酚酞溶液变为红色C．氨气遇到浓盐酸、硫酸都会发生反应，产生白烟现象D．氨气可被氯气氧化生成N2，同时还可能产生白烟现象解析：C项，NH3＋HCl===NH4Cl，有白烟生成，但与H2SO4反应不会产生白烟；D项，氨气可被氯气氧化生成N2，氯气被还原生成HCl，HCl与NH3化合产生白烟现象。

答案：C2．下列说法中正确的是()A．所有铵盐受热均可以分解，但产物不一定有NH3B．加热可除去NH4Cl中的少量NaHCO3C．在盛有硫酸亚铁铵[(NH4)2Fe(SO4)2]溶液的试管中，滴加少量NaOH溶液，在试管口用湿润的红色石蕊试纸检验，试纸变蓝D．铵盐都易溶于水，其水溶液均呈酸性解析：铵盐分解不一定产生氨气，如NH4NO3在400 ℃以上分解生成N2、NO2和H2O，A项对；Fe2＋比NH＋4更易结合OH－，因而加入少量NaOH不会产生NH3，C项错；NH4HCO3、(NH4)2S等溶液均呈碱性，D项错。

答案：A3．下列关于氨水的说法中，不正确的是()A．氨水和液氨不同，氨水是混合物，液氨是纯净物B．氨水中物质的量浓度最大的粒子是NH3·H2O(水除外)C．氨水显弱碱性，是弱电解质D．在1 mol·L－1氨水中，NH3·H2O、NH＋4、NH3的物质的量浓度之和为1 mol·L－1解析：氨气极易溶于水，发生如下反应，NH3＋H2O NH3·H2O NH＋4＋OH－；生成的氨水是混合物，其中的NH3·H2O是弱电解质，电离程度小，且NH3分子极易与H2O结合，故其中浓度最大的粒子是NH3·H2O(H2O除外)。

答案：C4．NH3是一种重要的化工原料，可以制备一系列物质(见图)。

下列说法正确的是()A．NH4Cl和NaHCO3都是常用的化肥B．NH4Cl、HNO3和Na2CO3受热时都易分解C．NH3和NO2在一定条件下可发生氧化还原反应D．图中所涉及的盐类物质均可以发生水解反应解析：NaHCO3不是化肥，Na2CO3不易分解，NaCl不发生水解反应。

太原市高考数学四模试卷(理科)A卷

太原市高考数学四模试卷（理科）A卷姓名:________ 班级:________ 成绩:________一、选择题 (共12题；共24分)1. （2分）(2020·漳州模拟) 已知复数满足，其中为虚数单位，则的共轭复数的虚部为（）A .B .C .D .2. （2分）(2019·天津模拟) 设全集，集合，，则（）A .B .C .D .3. （2分） (2019高一上·柳江月考) 设函数f（x），若f（x）＞f（0），则x的取值范围是（）A .B .C .D .4. （2分） (2016高一下·福州期中) 天气预报说，在今后的三天中，每一天下雨的概率均为40%．现采用随机模拟试验的方法估计这三天中恰有两天下雨的概率：先利用计算器产生0到9之间取整数值的随机数，用1，2，3，4表示下雨，用5，6，7，8，9，0表示不下雨；再以每三个随机数作为一组，代表这三天的下雨情况．经随机模拟试验产生了如下20组随机数：907 966 191 925 271 932 812 458 569 683 431 257 393 027 556 488 730 113 537 989据此估计，这三天中恰有两天下雨的概率近似为（）A . 0.35B . 0.25C . 0.20D . 0.155. （2分）某程序的框图如右图所示，输入N=5，则输出的数等于（）A .B .C .D .6. （2分） (2019高三上·葫芦岛月考) 将曲线上的每个点的横坐标伸长为原来的2倍（纵坐标不变），再将所得曲线关于y轴对称，最后得到的曲线的对称轴方程为（）A .B .C .D .7. （2分）(2017·太原模拟) 已知某几何体的三视图如图所示，其正视图为矩形，侧视图为等腰直角三角形，俯视图为直角梯形，则该几何体中最长的棱长是（）A . 4B . 4C . 4D . 88. （2分） (2015高二下·黑龙江期中) 已知（1+ax）5（1﹣2x）4的展开式中x2的系数为﹣16，则实数a 的值为（）A . ﹣1B . ﹣2C . 1D . 29. （2分）某市组织一次高三调研考试，考试后统计的数学成绩服从正态分布，其密度函数，则下列命题不正确的是（）A . 该市这次考试的数学平均成绩为90分B . 分数在120分以上的人数与分数在60分以下的人数相同C . 分数在110分以上的人数与分数在50分以下的人数相同D . 该市这次考试的数学标准差为2010. （2分）已知三棱锥S﹣ABC的四个顶点均落在球O的表面上，且SA⊥平面ABC，∠ABC=90°，，则球O的体积与表面积的比值为（）A .B .C .D .11. （2分）设F1 ， F2分别是双曲线的左、右焦点.若双曲线上存在点A，使,且，则双曲线的离心率为（）A .B .C .D .12. （2分）(2017·合肥模拟) 已知函数f（x）=xlnx﹣aex（e为自然对数的底数）有两个极值点，则实数a的取值范围是（）A .B . （0，e）C .D . （﹣∞，e）二、填空题 (共4题；共4分)13. （1分） (2016高二上·水富期中) 已知x，y满足则目标函数z=2x+y的最大值为________．14. （1分） (2017高一下·河口期末) 已知非零向量满足，则 ________．15. （1分）(2017·太原模拟) 已知点O是△ABC的内心，∠BAC=30°，BC=1，则△BOC面积的最大值为________．16. （1分） (2016高二下·清流期中) 在直角坐标系中，定义两点P（x1 ， y1），Q（x2 ， y2）之间的“直角距离”为d（P，Q）=|x1﹣x2|+|y1﹣y2|．现有下列命题：①已知P（1，3），Q（sin2α，cos2α）（α∈R），则d（P，Q）为定值；②原点O到直线x﹣y+1=0上任一点P的直角距离d（O，P）的最小值为；③若|PQ|表示P、Q两点间的距离，那么|PQ|≥ d（P，Q）；④设A（x，y）且x∈Z，y∈Z，若点A是在过P（1，3）与Q（5，7）的直线上，且点A到点P与Q的“直角距离”之和等于8，那么满足条件的点A只有5个．其中的真命题是________．（写出所有真命题的序号）三、解答题 (共7题；共70分)17. （10分） (2017高二下·河南期中) 已知正项数列{an}的前n项和为Sn ，若{an}和都是等差数列，且公差相等．（1）求数列{an}的通项公式；（2）令bn= ，cn=bn•bn+1，求数列{cn}的前n项和Tn．18. （5分） (2017高二上·临淄期末) 某工厂修建一个长方体无盖蓄水池，其容积为6400立方米，深度为4米．池底每平方米的造价为120元，池壁每平方米的造价为100元．设池底长方形的长为x米．（Ⅰ）求底面积，并用含x的表达式表示池壁面积；（Ⅱ）怎样设计水池能使总造价最低？最低造价是多少？19. （10分）(2020·海安模拟) 在棱长为的正方体中，O是AC的中点，E是线段D1O 上一点，且D1E＝λEO.（1）若λ=1，求异面直线DE与CD1所成角的余弦值;（2）若平面CDE⊥平面CD1O，求λ的值.20. （10分）已知椭圆的左、右焦点分别为，其离心率，点为椭圆上的一个动点，△ 面积的最大值为 .（1）求椭圆的标准方程；（2）若是椭圆上不重合的四个点，与相交于点，求的取值范围.21. （15分） (2016高二下·洛阳期末) 已知函数f（x）=lnx﹣a（1﹣）．（1）若a=1，求f（x）的单调区间；（2）若f（x）≥0，对任意的x≥1均成立，求实数a的取值范围；（3）求证：（）1008＞．22. （10分） (2017高二下·邢台期末) 在直角坐标系中，以坐标原点为极点，轴的非负半轴为极轴建立极坐标系.已知点的极坐标为，曲线的参数方程为为参数）.（1）直线过且与曲线相切，求直线的极坐标方程；（2）点与点关于轴对称，求曲线上的点到点的距离的取值范围.23. （10分） (2016高二上·呼和浩特期中) 证明下列不等式：（1）设a，b，c∈R*，且满足条件a+b+c=1，证明：≥9（2）已知a≥0，证明：＜．参考答案一、选择题 (共12题；共24分)1-1、2-1、3-1、4-1、答案：略5-1、答案：略6-1、7-1、8-1、答案：略9-1、答案：略10-1、11-1、答案：略12-1、二、填空题 (共4题；共4分)13-1、14-1、15-1、16-1、三、解答题 (共7题；共70分) 17-1、答案：略17-2、答案：略18-1、19-1、答案：略19-2、答案：略20-1、答案：略20-2、答案：略21-1、答案：略21-2、答案：略21-3、答案：略22-1、答案：略22-2、答案：略23-1、答案：略23-2、答案：略。

高考英语一轮复习 Unit4 Earthquakes任务型阅读全方位训练

入舵市安恙阳光实验学校高考英语一轮复习全方位配套训练人教版必修一Unit 4 Earthquakes任务型阅读2阅读下面短文，根据所读内容在表格中的空白处填入一个恰当的单词。

注意：每个空格只填一个单词。

Passage 1Most scientists are now certain that global warming is taking place.Gases such as carbon dioxide produced by burning of coal，oil，wood，together with industrial pollution，are creating a warm blanket around the earth.This blanket is trapping heat in the atmosphere and so raising the temperature of the earth.The evidence for global warming can now be seen in the world’s changing climate statistics.In Europe，eight of the last ten years have seen record high temperature.For northern Europe，this has generally been a change for the better.Gardens can even now grow tropical plants in England，though London may never see a “White Christmas” again.On the other hand，the countries around the Mediterranean Sea，and those south of the Sahara desert are receiving even less rain than before.Insub-Saharan Africa the crops are drying out in the fields and people are dying of starvation.In the Americas，the climate is becoming more extreme —the summers are getting hotter and hotter and the storms are becoming more violent.In 1999 the southern United States was struck by a series of destructive hurricanes，while the end of 1999 saw the worst floods ever in Venezuela.Meteorologists expect such trends to continue，and indeed to worsen，if global warming cannot be halted （终止）.In addition to worrying about rising global temperatures and more extreme weather conditions，scientists are closely monitoring sea levels around the world.These are slowly rising，as the northern and southern polar ice-caps start to melt.This will have serious consequences for low-lying countries near the sea，such as the coral islands in the Pacific，and Bangladesh where the River Ganges already folds the delta （三角洲） every year.Already parts of these places are disappearing under the rising tides.Title：Global Warming答案：1.Causes/Reasons 2.Evidences 3.decade 4.raining 5.starving 6.Increasingly 7.violent/destructive 8.Consequences 9.Rising10.MeltingPassage 2Becoming a fireman is a challenging and competitive job today.A fireman’s main duty is being scheduled according to the fighting and extinguishment （扑灭） of fire which definitely requires being a strong man，both mentally and physically.The duty of a fireman involves protection of life and property of the public.They are the servicemen who are decisively selected by an organization to deal with situations like fire.The duty of a fireman intentionally consists of helping innocent people in their time of need.Such type of jobs is one of those few jobs where service is provided for people when they need help immediately.This may include rescuing people from a building at fire，providing them with medical facilities，extinguishing fire in a house or in a large commercial building.Serving people is the main intention of these professionals.The satisfaction which a fireman gets from this type of job cannot be compared to any other profession in the world.Such profession demands top-level commitment and professionalism from those who have chosen it as a career.Fireman should possess the highest level of courage and patience to put their lives in danger for the sake of others.They undergo lessons of maintaining patience for long hours and go through complete preparation to become successful andwell-organized professional firemen.There are certain tests that are recommended before becoming a fireman.It’s not that easy to become a fireman nowadays.A fireman is supposed to deal with unexpected situations，and they should be skilled at communicating with others and be self-disciplined at the same time.In order to be a good fireman，one must undergo（经历，接受）strict local fire department’s training program after passing all the tests.All the fire departments conclude a two-to-four-month course，including classroom training and practical training that cover firefighting techniques，fire avoidance，dangerous materials and urgent situation medical pleting this training，trainees go through the department’s trial period of service that can last from three to six months，depending on the methods of selection.Firemen usually work both indoors and outdoors.They have to be on duty at all times and mostly work in shifts of at least 8 hours.They are also provided with several benefits which include medical aid plan，pension fund，annual leave and many more.Title：Fireman答案：1.handle/approach 2.Duties/Responsibilities 3.whenever/when 4.Putting 5.patient 6.mind munication/communicating8.Training/Courses sts 10.Benefits。

高三英语一轮复习 book 4 unit 3 a taste of english humour强化练习新人教版

Unit 3 A taste of English humourⅠ.单项填空1．They were pretty poor but most of their friends were even________.A．richer B．badly offC．worse off D．well off答案 C解析考查形容词及短语辨析。

句意为：他们相当穷，但是他们朋友中的大多数的境况甚至更差。

由语境可知C项正确。

2．—Credit cards are________useful when traveling.—True.They save us the trouble of taking too much cash.A．particularly B．partlyC．exactly D．gradually答案 A解析考查副词辨析。

修饰形容词useful，表示程度，所以用particularly，意思是“尤其”。

分句句意为：当你外出旅游的时候，信用卡尤其有用。

partly部分地；exactly 精确地；gradually慢慢地。

3．One learns a language by making mistakes and________them.A．corrects B．correctC．to correct D．correcting答案 D解析并列结构，making与correcting并列。

4．My wife________them as honored guests.A．entertained B．interestedC．amused D．encouraged答案 A解析句意为：我妻子把他们当作尊贵的客人招待。

entertain...as...把……当……招待。

5．________I had done it, I knew I had made a mistake.A．Hardly B．DirectlyC．Mostly D．Nearly答案 B解析directly 用作连词，相当于as soon as“一……就……”。

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高三一段边缘生专练（4）
1．如图1对应函数f（x），则在下列给出的四个函数中，图2
对应的函数只能是（）

A．y=f（|x|） B．y=|f（x）| C．y=f（﹣|x|） D．y=﹣f（|x
|）

4．已知正四面体ABCD和平面α，BC⊂α，当平面ABC与平面α所成的二面角为60°
，则平面

BCD与平面α
所成的锐二面角的余弦值为（）

A． B． C．或 D
．或

5．过双曲线上任意一点P作平行于x
轴的直线，交双曲线的两条渐

近线于A，B两点，若，则双曲线的离线率为．
6．已知函数f（x）=，若方程f（x）=a有四个不同的解x1，x2，x3，x
4
，且

x1＜x2＜x3＜x4，则的取值范围是
．
7．如图，在四棱锥A﹣BCDE中，AC⊥平面BCDE，∠CDE=∠CBE=90°，BC=CD=2，DE=BE=1
，

AC=，M为AE
的中点．

（1）求证：BD⊥平面AEC；
（2）求直线MB与平面AEC所成角的正弦值．
8
．已知函数．

（1）当a=1时，求f（x）的单调区间；
（2）记f（x）在[﹣1，1]上的最小值为g（a），求证：当x∈[﹣1，1]时，恒有．
21. 已知椭圆2222:10xyCabab的四个顶点组成的四边形的面积为22，且经过点21,2.

（1）求椭圆C的方程；
（2）若椭圆C的下顶点为P，如图所示，点M为直线2x上的一个动点，过椭圆C的右焦点F的直线
l垂直于OM，且与C交于,AB两点，与OM交于点N
，四边形AMBO和ONP的面积分别为12,SS.

求12SS的最大值.