数一考研考题2019

去百度文库，查看完整内容>内容来自用户:文都教育2019考研数学（一）考试真题（完整版）来源：文都教育一、选择题：1~8小题，每小题4分，共32分。下列每题给出的四个选项中，只有一个选项是符合题目要求的.1.当x0，若xtanx与xk是同阶无穷小，则k=A.1.B.2.C.3.D.4.2.设函数f(x)xx,x0,则x=0是f（x）的xlnx,x0,A.可导点，极值点.B.不可导点，极值点.C.可导点，非极值点.D.不可导点，非极值点.3.设｛un｝是单调增加的有界数列，则下列级数中收敛的是A.n.n1unB.(1)n1n1.un).C.(1un1unn1D.(un12n12un).)4.设函数Q(x,yx.如果对上半平面（y>0）内的任意有向光滑封闭曲线C都有y2ÑP(x,Cy)dxQ(x,y)d，那么函数y0P(x,y)可取为A.yx2.y3B.1x2.yy3C.11.xyD.x1.y5.设A是3阶实对称矩阵，E是3阶单位矩阵.若A2A2E，且｜A｜=4，则二次型xTAx的规范形为A.y1y2y3.222B.y1y2y3.222C.y1y2y3.222D.y1y2y3.2226.如图所示，有3张平面两两相交，交线相互平行，它们的方程ai1xai2yai3zdi(i1,2,3)组成的线性方程组的系数矩阵和增广矩阵分别记为A,

2019考研数学真题都是在考试之后才能公布，因此之前看到的多数都是押题或者往年的题。具体还需要这两天22号，23号考试结束之后才会公布出来哦。可以第一时间获取考研真题解析直播视频的，请查看我们官网的消息哦。不要错过。

院校官网，网上可以买，或者咨询一下自己的学姐学长，也可以找一些考研机构获取，一般真题很多是没有答案的。

去百度文库，查看完整内容>内容来自用户:张子love2019年考研数学二真题解析一、选择题1—8小题．每小题4分，共32分．1．当时，若与是同阶无穷小，则（）（A）（B）（C）（D）【答案】（C）【详解】当时，，所以，所以．2．曲线的拐点是（）（A）（B）（C）（D）【答案】（D）【详解】，，，；令得，且，所以是曲线的拐点；而对于点，由于，而，所以不是曲线的拐点．3．下列反常积分发散的是（）（A）（B）(C）（D）【答案】（D）【详解】（1）当时，是关于的一阶无穷小，当然发散；（2）用定义：，当然发散．4．已知微分方程的通解为，则依次为（）（A）（B）(C）（D）【答案】（D）【详解】（1）由非齐次线性方程的通解可看出是特征方程的实根，从而确定；（2）显然，是非齐次方程的特解，代入原方程确定．5．已知平面区域，记，，，则（）（A）（B）（C）（D）【答案】（A）【详解】（1）显然在区域，此时由结论当时知道，所以；（2）当时，令，则，；令得到在唯一驻点，且，也就是在取得极小值，在同时取得在上的最大值，也就有了结论，当时，，也就得到了；由（1）、（2）可得到．6．设函数的二阶导函数在处连续，则是两条曲线，在对应的点处相切及曲率相等的【故（

去买盗版视频才几十到一百多

不是19，但是最新的链接： 提取码：84z6

19年真题刚考完一般在市面上很难买到，但是因为有很多教育机构老师或学生有参加考试，会记得题目，在微博上搜索关键字“2019数学三”就会有相应的数学卷子和答案，一般建议看权威机构的会较为准确

9月参加雅思考试的勇士们 首要面对的一大难题就是： 雅思口语新题！ 何为变题？ 每年1、5、9月为雅思口语变题季 包括 Part1、Part2、Part3 雅思口语话题会淘汰30%~40%旧题 并补充相应数量的新题！ 变题季的题目无非就是以下3种 1. 新题—— 全新题，出现频次一般较高，重中之重！ 2. 旧题回库—— 去年或者是考过的题，回归到了题库，那就意味着9~12月会继续考，后期备考学生们要留意了。 3. 重点老题—— 为各大考场出现频次极高的题，要重点准备~ 9~12月雅思口语完整题库 新题+保留旧题 都get了吗？？？ 还没有拿到的烤鸭不要急走一波！ 你没有看错哦，是 口！语！题！库！ 有了这份雅思口语题库 接下来你们的 雅思口语分数将会直线飙升！ 全部！ 免费！ 送给你！ 换题季初期只要好好准备 抽到原题的几率敲大呦 Part1 1.Haircut (1)Have you ever had an unhappy haircut experience? (2)How long have you had your current haircut? (3)How often do you have a haircut? (4)Do you like having your hair cut? (5)What’s your last haircut? 2.Jeans (1)Do you wear jeans? (2)How often do you wear jeans? (3)Do you like wearing jeans, why? (4)Why do you think jeans are popular? (5)Do you spend a lot on jeans? 3.Voice (1)Do you like your own voice? (2)Has your voice ever changed? (3)Do you enjoy recording your voice and listening to it? 4.Concentration (1)When do you need to be focused? (2)What may distract you when you are trying to stay focused？ (3)What do you do to help you concentrate? (4)Is it difficult for you to stay focused on something? 5.Walking (1)Do you walk a lot? (2)Do you walk more often than in the past? (3)Do you think people will take a walk more often or not? 6.Languages (1)What languages can you speak? (2)Do you think it’s difficult to learn a new language? (3)Will you learn other languages in the future? Part2&3 1.科技产品 Describe an important technological proct you bought You should say: What it is How you use it Why you bought it And explain why you think it is important (1)What do you think is the most important equipment in the workplace? (2)Which technological proct do you think is most useful at home? (3)Do you think there will be no teachers to teach in schools in the future? (4)Do you think some technological procts make people lazier? Why? 2.人工智能 Describe a proct or application which is based on artificial intelligence You should say: What it is What it is used for How it is used And explain what you think of it (1)How will artificial intelligence affect our lives? (2)Will artificial intelligence have emotions in the future? 3.去过的城市 Describe a city you once went to with your family You should say: What the city was Why you went there What the city was like And explain how you felt about it (1)What kind of city do you like? (2)What are the advantages of living in a city? (3)Why do many people nowadays prefer living in the suburbs? 4.教老年人 Describe a time when you taught an older person something new You should say: When it happened Who you taught Why you taught this person And explain how you felt about it (1)Do you think old people know more things than young people? (2)Is it easy for old people to use new technology? (3)Why do some old people refuse to use new technology? (4)What are the advantages and disadvantages for old people to use smart-phones? 5.开车旅行 Describe a journey that you went on by car You should say: When was is Where you went Who you were with And how you felt about the journey (1)Do you think cars are a daily necessity? (2)What will cars look like in the future? (3)Is driving a skill that everybody must learn? (4)What are the downsides of having a car? ......... 篇幅有限，小秘书就不一一贴出来了 获取完整版请添加朗阁小秘书微信号 打call 打call 打call 领取方式 获取完整PDF版请关注“北京朗阁培训中心”微信公众号，添加朗阁小秘书为好友，回复“口语”，即可免费领取！

你好：都一样。怎么说那，会者不难，难者不会，如果你初试成绩能考上400分以上，可以说报考哪里都会成功的。每年报考985学校的考生都会有几个400分以上的，但是，报考211学校的考生，初试成绩在400分以上的绝少。平心而论，考研初试的试题，难度不是太大，但，试题特别的活，实在不好把握，一看不难，一动起笔来，感觉似是似非，无从下手，在思想高度集中，不知不觉交卷的铃声响起，稀里糊涂的走出考场，感觉自己都会，时间不够用。考试结束后，给自己估分，无从下手，哭笑不得。高考时给自己估分相差无几，考研初试给自己估分相差千里。我这个人长这么大，从没有骂过人，我深知良言一语暖三冬，恶语伤人六月寒的道理。我的体会是，考研初试需要考生真正把知识弄懂吃透，真正能举一反，须要基础牢，知识面广，没有死角，头脑反应要快，也就是熟中生巧！目前考研阅卷：英语教育部负责，政治、数学所在省考试办负责，专业课报考学校负责。考研是6分成绩，4分运气！