课时跟踪检测(四)演绎推理
一、选择题
1．给出下面一段演绎推理：
有理数是真分数，……………………………大前提
整数是有理数，……………………………小前提
整数是真分数．……………………………结论
结论显然是错误的，是因为()
A．大前提错误B．小前提错误
C．推理形式错误D．非以上错误
解析：选A推理形式没有错误，小前提也没有错误，大前提错误．举反例，如2是有理数，但不是真分数．
2．“所有金属都能导电，铁是金属，所以铁能导电”这种推理方法属于()
A．演绎推理B．类比推理
C．合情推理D．归纳推理
解析：选A是由一般到特殊的推理，故是演绎推理．
3．下面几种推理过程是演绎推理的是()
A．两条直线平行，同旁内角互补，如果∠A与∠B是两条平行直线的同旁内角，则∠A＋∠B＝180°
B．某校高三(1)班有55人，(2)班有54人，(3)班有52人，由此得高三所有班人数超过50人
C．由三角形的性质，推测四面体的性质
D．在数列{a n}中，a1＝1，a n＝1
2?
?
?
?
a n－1＋
1
a n－1(n≥2)，由此归纳出a n的通项公式
解析：选A B项是归纳推理，C项是类比推理，D项是归纳推理．
4．“∵四边形ABCD是矩形，∴四边形ABCD的对角线相等．”补充以上推理的大前提()
A．正方形都是对角线相等的四边形
B．矩形都是对角线相等的四边形
C．等腰梯形都是对角线相等的四边形
D．矩形都是对边平行且相等的四边形
解析：选B推理的大前提应该是矩形的对角线相等，表达此含义的选项为B.
5．有一段演绎推理是这样的：直线平行于平面，则直线平行于平面内所有直线；已知
直线b ?平面α，直线a ?平面α，直线b ∥平面α，则直线b ∥直线a .结论显然是错误的，这是因为( )
A ．大前提错误
B ．小前提错误
C ．推理形式错误
D ．非以上错误
解析：选A 大前提是错误的，直线平行于平面，则不一定平行于平面内所有直线，还有异面直线的情况．
二、填空题
6．若有一段演绎推理：“大前提：整数是自然数．小前提：－3是整数．结论：－3是自然数．”这个推理显然错误，则推理错误的是________(填“大前提”“小前提”或“结论”)．
解析：整数不全是自然数，还有零与负整数，故大前提错误．
答案：大前提
7．已知推理：“因为△ABC 的三边长依次为3,4,5，所以△ABC 是直角三角形．”若将其恢复成完整的三段论，则大前提是____________________．
解析：大前提：一条边的平方等于其他两条边的平方和的三角形是直角三角形． 小前提：△ABC 的三边长依次为3,4,5，满足32＋42＝52.结论：△ABC 是直角三角形． 答案：一条边的平方等于其他两条边的平方和的三角形是直角三角形
8．若不等式ax 2＋2ax ＋2＜0的解集为空集，则实数a 的取值范围为________．
解析：①a ＝0时，有2＜0，显然此不等式解集为?.
②a ≠0时需有??? a ＞0，Δ≤0?????? a ＞0，4a 2－8a ≤0??
????
a ＞0，0≤a ≤2， 所以0＜a ≤2.
综上可知，实数a 的取值范围是[0,2]．
答案：[0,2]
三、解答题
9．如图，在直四棱柱ABCD -A 1B 1C 1D 1中，底面是正方形，E ，F ，G 分别是棱B 1B ，D 1D ，DA 的中点．求证：
(1)平面AD1E∥平面BGF；
(2)D1E⊥AC.
证明：(1)∵E，F分别是B1B和D1D的中点，∴D1F綊BE，
∴四边形BED1F是平行四边形，
∴D1E∥BF.
又∵D1E?平面BGF，BF?平面BGF，
∴D1E∥平面BGF.
∵F，G分别是D1D和DA的中点，
∴FG是△DAD1的中位线，
∴FG∥AD1.
又∵AD1?平面BGF，FG?平面BGF，
∴AD1∥平面BGF.
又∵AD1∩D1E＝D1，
∴平面AD1E∥平面BGF.
(2)连接BD，B1D1，
∵底面ABCD是正方形，
∴AC⊥BD.
∵D1D⊥AC，BD∩D1D＝D，
∴AC⊥平面BDD1B1.
∵D1E?平面BDD1B1，
∴D1E⊥AC.
10．在数列{}a n 中，a 1＝2，a n ＋1＝4a n －3n ＋1，n ∈N *.
(1)证明数列{}a n －n 是等比数列．
(2)求数列{}a n 的前n 项和S n .
(3)证明不等式S n ＋1≤4S n ，对任意n ∈N *皆成立． 解：(1)证明：因为a n ＋1＝4a n －3n ＋1， 所以a n ＋1－(n ＋1)＝4(a n －n )，n ∈N *. 又a 1－1＝1，
所以数列{}a n －n 是首项为1，且公比为4的等比数列．
(2)由(1)可知a n －n ＝4n －1，
于是数列{}a n 的通项公式为a n ＝4n －1＋n .
所以数列{}a n 的前n 项和S n ＝4n －13＋n (n ＋1)2
. (3)证明：对任意的n ∈N *，
S n ＋1－4S n ＝4n ＋1－13＋(n ＋1)(n ＋2)2－44n －13＋n (n ＋1)2＝－12
(3n 2＋n －4)≤0. 所以不等式S n ＋1≤4S n ，对任意n ∈N *皆成立．
Unit 5 Languages Around the World Period One 1.Chinese c__________ are made out of simple basic strokes. 2. C is the art of producing beautiful handwriting using a brush. 3. Like China, the USA is a large country in which many different d are spoken. 4. The rose is regarded as a s of love in both China and some Western countries. 5. Carbon dioxide(CO?) is one of the main (因素) in global warming which is negatively affecting everyone. II.Blank filling.（在空白处填入适当的内容（1个单词）或括号内单词的正确形式。） 1.Diligence is the means which one makes up for one's dullness(迟钝). 2. Health problems _________ (connect) with bad eating habits and a lack of exercise. 3. There are various reasons people choose to learn a foreign language 4. In the last few years the city of Bozhou has spread out rapidly in all (direction). 5. the growing heat these workers are still all in top hats and heavy uniforms. 6. They enjoy participating in a wide ________(various) of activities, both locally and further afield. 7. To meet the needs of _________ unified country, the First Qin Emperor took a series of measures. 8. We think that peace is not only a distant goal we seek, it is a means by which we arrive at that goal. 9. Today, Spanish is the world’s fourth most commonly(speak) language, after Chinese, English and Hindi. 10. Changing the attitude _____ learning foreign languages may be a hard task but the government decides to try! 1. I live in the place which the medicine capital city Bozhou. 2. students are registering for extra-curricular activities. 3. Every means has been tried, but we find only _______________ can we learn English well. 4. Chinese is an old language, and its earliest characters nearly four thousand years ago. 5. Because of his broken English, he couldn’t make himself understood, which the embarrassment. 6. The designer, with whom I have been working since 1999, shaping my views of the work. 7. There are extra-curricular activities including sports, painting, dancing and playing music as well. 8. It is what parents say and do in family life, which may have a life-long effect on their children. 9. In southern China,bats the door, because they are symbols of luck, health, wealth and happiness. 10. The school year two semesters, the first of which is September through December, the second January through May. IV. Cloze. （在空白处填入适当的内容（1个单词）或括号内单词的正确形式。） Nobody wants to be aged, but____1____it comes to visiting cities, most of us want to visit the world's oldest cities. Luoyang is one of the oldest and most ____2____(attract) cities in the world that I'd like to recommend to you. Luoyang stands out ____3____the oldest continually inhabited (持续居住的) city in Asia. The city is considered to be ____4____birthplace of Chinese culture and history as well as being one of the Seven Ancient Capitals of China. There ____5____ (be) no other city in China that has seen so many____6____(dynasty) like Luoyang. With such a long and exciting history, Luoyang has really a lot ____7____ (offer). The longmen Grottoes(龙门石窟), which ____8____(include) in the world Heritage List (世界遗产名录)since 2000, and many historic Buddhist temples constantly attract tourists from all over the world. Luoyang is also famous 9 the White Horse Temple, the earliest Buddhist temple ____10____(build) in China. Are you anxious to visit the city? V. Reading Comprehension
课时跟踪检测(十二) 苏武传 (时间：40分钟 满分：50分) 一、基础巩固(18分，每小题3分) 1．下列各句中加点词语的解释不正确的一项是( ) A ．单于使使晓武，会论． 虞常 论：判罪 B ．汉使张胜谋杀单于近臣， 当． 死 当：应当 C ．扶辇下除． ，触柱折辕 除：殿阶 D ．律前负． 汉归匈奴 负：背叛 解析：选B B 项，“当”，判处。 2．下列句子中，没有通假字的一句是( ) A ．与旃毛并咽之 B ．掘野鼠去草实而食之 C ．大臣亡罪夷灭者数十家 D ．武与副中郎将张胜及假吏常惠等募士斥候百余人俱 解析：选D A 项，“旃”同“毡”；B 项，“去”同“弆”；C 项，“亡”同“无”。 3．下列各组句子中，加点词的意义和用法完全相同的一组是( ) A.????? ①少以．父任，兄弟并为郎②恐前语发，以． 状语武 B.????? ①乃．徙武北海上无人处②使牧羝，羝乳乃．得归 C.????? ①久之．，单于使陵至海上②宜皆降之． D.????? ①虽．生，何面目以归汉②虽．蒙斧钺汤镬，诚甘乐之 解析：选D D 项，均为连词，即使。A 项，第一个“以”，介词，意为“因为”；第二个“以”，介词，意为“把”。B 项，第一个“乃”，连词，意为“于是”；第二个“乃”，副词，意为“才”。C 项，第一个“之”为音节助词，无实义；第二个“之”，代词，“他们”。 4．下列各句中，加点词语的意义与现代汉语相同的一项是( ) A ．汉天子我丈人．． 行也 B ．会缑王与长水虞常等谋反．． 匈奴中 C ．武使匈奴，明年．． ，陵降，不敢求武 D ．武父子亡功德，皆为陛下所成就．．
课时跟踪检测(四) Project Ⅰ.单词拼写 1．A kingdom (王国) is a country that is ruled by a king or a queen. 2．Though they came from different places, they live in perfect harmony (融洽)． 3．“Of course I don't mind，” she answered mildly (温和地)． 4．They have officially (正式地) announced their engagement. 5．They are surrounded (环绕) with dangers. 6．The article accurately reflects (反映) public opinions. Ⅱ.单句改错 1．His parents died, left him an orphan.left→leaving 2．How many members have official registered in the club？official→officially 3．When her son finally left home, Emily felt completely at loss.at后加a 4．He works at perfect harmony with his colleagues.at→in 5．I have such little interest in English that I almost have to give it up.such→so 6．Being surrounded by big mountains, the village is almost unknown to people outside.去掉Being Ⅲ.句型转换 1．He always thinks of me as a fool. →He always considers me to be a fool. 2．He ran so fast that I could hardly keep pace with him. →So fast did he run that I could hardly keep pace with him. 3．I hope that you will live harmoniously with your new neighbors. →I hope that you will live in harmony with your new neighbors. 4．A group of soldiers in rags were marching in the depth of the forest. →Marching in the depth of the forest were a group of soldiers in rags. 5．The beautiful sunrise on the top of Mount Tai left us speechless. →The beautiful sunrise on the top of Mount Tai left us at a loss for words. Ⅳ.完形填空 Half a year before graduation from college, my son began to seek a job. __1__ the financial crisis, fewer companies would like to __2__ new staff. My son targeted a company that was __3__ to hire only one person __4__ there were more than twenty people filling their resumes. After the interview, there would only be 3 who could enter the final round, which would later __5__ one person to be employed. Everything seemed to go quite __6__ and my son passed the first round and entered the final round in a week. On the day of the final interview, my son and the other two __7__ arrived at the interview
课时跟踪检测（十八）语句补写 1．在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过15个字。 湿地可作为直接利用的水源，可有效补充地下水，还能有效控制洪水和防止土壤沙化，滞留沉积物、有毒物、营养物质，从而__①__；湿地还是众多植物、动物特别是水禽生长的乐园，同时，又为人类提供食物、能源和原材料，因此，湿地是人类__②__。我国湿地生态环境十分脆弱，当今中国，庞大的人口数量、快速的经济增长、有限的土地资源，使得湿地保护面临着严峻的挑战。我们要从人类生存和发展的角度认识其重要意义，即__③__。 答：① ② ③ 解析：第一空由前文的“有效……还能有效……”可得出在改善环境污染方面的作用；第二空由上文“还是……又为人类……”可知，湿地是人类赖以生存和发展的基础；第三空由前文可知，此处应从保护湿地与人类的关系角度组织答案。 答案:①改善环境污染②赖以生存和发展的基础③保护湿地就是保护我们人类自己2．在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过15个字。 华罗庚曾经说过，读书的真功夫在于“既能把薄的书读成厚的，又能把厚的书读成薄的”，这番对读书的独到见解，耐人寻味。从取向上说，__①__，“读厚”则偏重于求宽度。从方法上说，“读薄”需要开掘、“蒸馏”，__②__。深入了解一个民族的重要途径，就是在把书“读薄”的同时，把书“读厚”。读书是一门学问、一门艺术，其真谛和要义唯在于：__③__。如此循环往复，则境界全出。 答：① ② ③ 解析：解答本题要联系前后文内容作答。第一处结合后文内容：“读厚”则偏重于求宽度。“读厚”对“读薄”，“宽度”对“深度”。第二处结合前文内容：“读薄”需要开掘、“蒸馏”。“读薄”对“读厚”，开掘、“蒸馏”对拓展、杂糅。第三处结合前后文内容，“既能把薄的书读成厚的，又能把厚的书读成薄的”，如此循环往复。所以应是由“薄”而“厚”，再由“厚”而“薄”。 答案：①“读薄”偏重于求深度②“读厚”则需要拓展、杂糅③由“薄”而“厚”，
课时跟踪检测(三) (时间：40分钟满分：52分) 一、基础巩固(12分，每小题3分) 1．下列各组词语中加点的字的读音完全不相同的一项是() A．挨．打/挨．近提．防/提．案连累．/负债累．累 B．发．动/发．廊相．貌/相．互施舍．/退避三舍． C．兴．趣/兴．奋数．说/数．控混．蛋/混．水摸鱼 D．要塞．/塞．外转．变/旋转．冠．军/怒发冲冠． 解析：选B A项，ái/āi，dī/tí，lěi；B项，fā/fà，xiàng/xiāng，shě/shè；C项，xìng/xīng，shǔ/shù，hún；D项，sài，zhuǎn，guàn/guān。 2．下列各句中，加点的成语使用正确的一项是() A．他在长达一个小时的演讲中引经据典 ．．．．，用大家所熟知的名人、名言、名事来作妙喻，给人留下了深刻印象。 B．今年的第一场春雨不期而遇 ．．．．，虽然没有电视台预报的降水量大，但还是让京城一直干燥的空气变得湿润了一些。 C．伴着落日的余晖，诗人缓步登上了江边的这座历史名楼，极目远眺，晚霞尽染，鸿 雁南飞，江河日下 ．．．．，诗意油然而生。 D．满车的猪崽儿从车上重重摔到地面，有的被活活摔死，有的挤压成一堆嗷嗷待哺 ．．．．，现场一片狼藉。 解析：选A A项，“引经据典”，引用经典中的语句或故事。B项，“不期而遇”，没有约定而意外地相遇。一般用于人与人之间，这里用错对象。C项，“江河日下”，江河的水天天向下游流，比喻情况一天天坏下去。本句望文生义，理解成“落日下的江河”，错。D项，“嗷嗷待哺”，饥饿时急于求食的样子。形容受饥饿的悲惨情景。这里指叫声，应用“嗷嗷乱叫”。 3．下列各句中，没有语病的一句是() A．实施创新驱动发展战略，要面向世界科技前沿，瞄准国家的需求，创新成果转化为实实在在的新技术、新产品、新产业。 B．相关人士指出，3D打印建筑刚刚诞生，缺少必要的安全与质量规范，不过，它能否替代传统的房屋建筑方式，还有待时间的检验。 C．亚洲基础设施投资银行是中国倡议并主导建立的多边国际金融机构，其主要目标是促进亚洲各国的基础设施建设和经济一体化。 D．随着网络购物的兴起，我国快递业务发展迅猛，2014年快递业务量达140亿件，同比增长52%，跃居世界第一的份额。 解析：选C A项，缺少介词，应在“创新成果转化……”前面加上“将”。B项，主
高中校本教材新高考·新理念·新教材课时跟踪检测（必修一） Unit 1 Teenage Life Period Two 命题人: 班级：姓名： 1.The school is responsible for the ___________(安全) of all the students. 2. Choosing a suitable _______ (标题)for your passage is of great importance. 3. I hope I can join your company when I g_________ from Peking University. 4. The volunteer work experience is a great way to give back to the ___________(社区). 5. Getting a notebook to help you keep a _________(计划；安排) of the things will stop you putting things off. II.Blank filling.（在空白处填入适当的内容（1个单词）或括号内单词的正确形式。） 1. It’s _________ big challenge for you to complete any personal goal in time. 2. All the students are brave enough to face up to __________ comes up in the future. 3. Whenever I'm facing a __________(difficult), I always tell myself, "Don't ever quit!" 4. The first week was all a bit confusing, _________soon I got used to the new school life. 5. We can try a course for two weeks after we register for it. After that, we cannot change _______. 6. Nowadays, parents take more _________(responsible) for the education of their children than before. 7. Girls used to take fewer _________(advance) math courses than boys but now they are taking just as many. 8. I find it really _______(annoy) when some students say I got good marks in the exams because of being lucky. 9. We _______(high) recommended that students read some materials from the English-speaking countries. 10. I find that looking after children is a __________(challenge) job where you need to be patient and careful. 1.The runner failed to __________________ the others though he tried his best. 2.There was nobody else at hand, so we had to do all this ___________________. 3.We have to ______________________ whatever the future may have in store. 4.We are going to set up a food bank _______________ food to hungry people. 5.We are told to ______________ keeping the room tidy and cleaning the chalkboard. 6. I am going to start my first job, but I what to wear for work. 7. —I have the Oral English Competition. —What a ridiculous idea. You even don’t know how to introduce yourself in English. 8. He used to live in the countryside but now he living in the noisy area. 9. Before we leave here, we need to what to take and what to leave behind. 10.These workers had been in the United States for twenty or more years and therefore English. III. Cloze. （在空白处填入适当的内容（1个单词）或括号内单词的正确形式。） “The secret to getting ahead is getting started.” — Mark Twain S taying active in more ways than one. First of all, don’t be a bystander. Don’t let things pass you by 1 you are there to experience them. Try a new fitness schedule, join a club, find new ways 2 (meet) people, play basketball o r team sports. The second piece of “staying active” has to do 3 taking action—there is a difference between saying you are going to do something 4 actually carrying it out. Mean what you say and say what you mean. Seize 5 (opportunity) when you can. “Am I something? And the answer comes, already am, always was, and I still have time to be.” — Anis Mojgai You live your life in a small community at a small school and you only see a small piece of the world. Then, Suddenly you 6 (throw) into a large community at a large school, where there are thousands of young, insecure, definitely 7 (confuse) freshmen. They are all trying to fit in, 8 if everybody is trying to be someone they are not, no one can see them for who they really are. Don’t feel the need to obey anyone else’s idea of 9 you should be as a freshman. This goes along with being true to yourself, but there is a large amount of freedom that 10 (come) from being confident in who you are. Good habits formed at youth make all the difference. - 1 -
课时跟踪检测（一） Welcome to the unit & Reading — Language points Ⅰ.单句语法填空 1．There are 30 people injured in the traffic accident but the injured were rescued at once.(injure) 2．She was confident of her becoming popular with the students. 3．I didn't want to add to my mother's worry, so I hurried home. 4．It is reported in the newspaper that talks between the two countries are making progress. 5．He appears careless, but in reality, he is a very careful person. Ⅱ.完成句子 1．如果你认为这样方便的话，我们把时间定在下午六点。 If you think that it_is_convenient_to_you,_we will fix the time at 6：00 pm. 2．我们都赞成他在会上提出的计划。 We all agreed to the plan he_had_put_forward at the meeting. 3．球队和球迷确信能够赢得即将到来的比赛。 The team and the fans are_confident_of_winning the coming match. 4．她吃了一惊，他居然还记得她的名字。 It_amazed_her that he still remembered her name. 5．需要采取措施使农田免遭洪水的侵袭。 Some measures are needed to_secure_the_farmland_against/from floods. 6．一看到这张聚会照片，她就陷入了对过去的美好回忆中。 No_sooner_had_she_seen the get-together photo than she got lost in the old sweet memories. 7．已经证明你的计划是实用的。 It_has_been_proved_that your plan is practical. Ⅲ.完形填空 Throughout history, many great leaders and explorers have tried hard to find objects or other ways to live forever. While it might sound __1__ to live forever, I believe that what makes life so __2__ is that it doesn't last forever. So, I don't __3__ that living forever is a good idea. For one thing, I think living forever would be very __4__. We always have to find ways to __5__ ourselves in a normal lifetime. __6__ you lived forever, you would still
Unit 2 Robots Learning about Language Using Language Ⅰ.单句语法填空 1．It was an absurd arrangement, bound to_lead (lead) to catastrophe. 2．She is junior to me but she looks mature. 3．The young man has a talent for management, so you can rely on him to do the work perfectly. 4．I don't know when they got divorced (divorce)． 5．Try to set aside some money each month for future use. Ⅱ.完成句子 1．如果这样的话，你的观点一定会和他的起冲突。 If so, your points of view are_bound_to conflict with his. 2．小时候，她写了很多优秀的诗歌，显示出了文学天赋。 She wrote many excellent poems at an early age, showing_a_talent_for literature. 3．为了身体健康，我们应该留出一些时间锻炼身体。 For the benefit of our health, we should_set_aside_some_time to take exercise. 4．童年的一切一下子涌入我的大脑，仿佛它们刚刚发生似的。 Everything in my childhood crowed upon my mind as_if_they_had_just_happened. 5．汤姆变成了法官，然而他依然是个渔夫。 Tom became a judge while_he_remained_a_fisherman. Ⅲ.完形填空 A library is a place to find out about almost anything. In it there are mostly __1__， but there are also pictures, papers, magazines, maps, records, special science and art shows, films, plays, and contests may also be __2__ in a library. __3__， a library only had books, and these were difficult to get. There were __4__ books that no one was __5__ to take them out of the library. After the printing machine was invented, books could be made __6__ and libraries got more books. To borrow a book to be __7__ home today, a person just needs a library card. The person goes to the main desk to __8__ a library helper check the book out. The helper prints the card with the date by which the book __9__ be returned to the library. If the book is returned __10__， the person must usually __11__ money for having broken the __12__.
课时跟踪检测（三十八） 空间几何体及表面积与体积 [A 级 保分题——准做快做达标] 1.关于空间几何体的结构特征，下列说法中不正确的是( ) A ．棱柱的侧棱长都相等 B ．棱锥的侧棱长都相等 C ．三棱台的上、下底面是相似三角形 D ．有的棱台的侧棱长都相等 解析：选B 根据棱锥的结构特征知，棱锥的侧棱长不一定都相等． 2．一个球的表面积为16π，那么这个球的体积为( ) A. 16 3 π B.323 π C ．16π D ．24π 解析：选B 设球的半径为R ，则由4πR 2 ＝16π，解得R ＝2，所以这个球的体积为43πR 3＝323 π. 3．如图所示，等腰△A ′B ′C ′是△ABC 的直观图，那么△ABC 是( ) A ．等腰三角形 B ．直角三角形 C ．等腰直角三角形 D ．钝角三角形 解析：选B 由题图知A ′C ′∥y ′轴，A ′B ′∥x ′轴，由斜二测画法知，在△ABC 中， AC ∥y 轴，AB ∥x 轴，∴AC ⊥AB .又因为A ′C ′＝A ′B ′，∴AC ＝2AB ≠AB ，∴△ABC 是直角 三角形． 4．下列说法中正确的是( ) A ．各个面都是三角形的几何体是三棱锥 B ．以三角形的一条边所在直线为旋转轴，其余两边旋转形成的曲面所围成的几何体叫圆锥 C ．棱锥的侧棱长与底面多边形的边长相等，则该棱锥可能是六棱锥 D ．圆锥的顶点与底面圆周上的任一点的连线都是母线 解析：选D 当一个几何体由具有相同的底面且顶点在底面两侧的两个三棱锥构成时，尽管各面都是三角形，但它不是三棱锥，故A 错误；若三角形不是直角三角形或是直角三角形但旋转轴不是直角边所在直线，所得几何体就不是圆锥，故B 错误；若六棱锥的所有棱都
课时跟踪检测(三十三) 数 列 求 和 1．已知{a n }是首项为1的等比数列，S n 是{a n }的前n 项和，且9S 3＝S 6，则数列???? ?? 1a n 的 前5项和为( ) A.158或5 B.3116或5 C.3116 D.158 2．已知数列{a n }的前n 项和S n ＝an 2＋bn (a 、b ∈R )，且S 25＝100，则a 12＋a 14等于( ) A ．16 B ．8 C ．4 D ．不确定 3．数列112，314，518，7116，…，(2n －1)＋1 2n ，…的前n 项和S n 的值等于( ) A ．n 2＋1－1 2n B ．2n 2－n ＋1－1 2 n C ．n 2＋1－ 12 n －1 D ．n 2－n ＋1－1 2 n 4．(2019·“江南十校”联考)若数列{a n }为等比数列，且a 1＝1，q ＝2，则T n ＝1a 1a 2＋ 1 a 2a 3 ＋…＋ 1 a n a n ＋1 的结果可化为( ) A ．1－1 4n B ．1－1 2n C.2 3??? ?1－14n D.2 3? ???1－12n 5．(2019·珠海模拟)已知等差数列{a n }的前n 项和为S n ，a 5＝5，S 5＝15，则数列???? ? ?1a n a n ＋1的前100项和为( ) A.100101 B.99101 C.99100 D.101100 6．已知函数f (n )＝????? n 2(当n 为奇数时)， －n 2(当n 为偶数时)， 且a n ＝f (n )＋f (n ＋1)，则a 1＋a 2＋a 3＋…＋a 100 等于( ) A ．0 B ．100 C ．－100 D ．10 200 7．在等差数列{a n }中，S n 表示前n 项和，a 2＋a 8＝18－a 5，则S 9＝________. 8．对于数列{a n }，定义数列{a n ＋1－a n }为数列{a n }的“差数列”，若a 1＝2，{a n }的“差数列”的通项公式为2n ，则数列{a n }的前n 项和S n ＝________.
高中英语学习材料 madeofjingetieji 课时跟踪检测（一） Warming Up & Reading — Language Points Ⅰ.单句语法填空 1．It was in prison that he set down the story. 2．After going through the woods, you’ll find a hospital. 3．The house fell down before she was able to save her little daughter. 4．She joined an English club in order to improve her English. 5．The couple told us it was the fourth time that they had_visited (visit) the West Lake. 6．Before eating, please add some salt to the dish. 7．As far as I’m concerned (concern), it is not a good idea to go camping tonight. 8.While swimming (swim) in the river, we saw a fish jump out of the river. 9．It is no good staying up too late every day. Ⅱ.完成句子 1.He was_very_upset_about_the_fact (为此事很难过) that they couldn’t go to the beach. 2．The teacher made every effort to calm_his_student_down (使他的学生冷静下来) after the exam. 3．I got up early in_order/so_as_not_to_be_late_for_school (为了上学不迟到)． 4．The police went_through_our_luggage (检查了我们的行李) before we got on the plane. 5．A_series_of_wet_days (一连串的雨天) drove me crazy. 6．The time I spend on reading every day adds_up_to_two_hours (合计两个小时)．7．I won’t go there unless_(I_am)_invited (除非受到邀请)． 8．He treated me so badly that I couldn’t_stand_it_any_longer (不能再忍受了)． Ⅲ.阅读理解 A Dear Mr Black， I used to have a really good group of friends. Now they’re all getting into smoking and drinking. I want to find a new group of friends, but I’m shy. How can I know who are the types of people I should make friends with, and who will accept me? Yours， Mike