2019年考研真题及答案公布情况

2019考研英语二真题完整版

12019考研英语（二）真题+答案详解（完整版）来源：文都教育SectionIUseofEnglishDirections:Readthefollowingtext.Choosethebestword(s)foreachnumberedblankandmarkA,B,CorDontheANSWERSHEET.(10points)Weighingyourselfregularlyisawonderfulwaytostayawareofanysignificantweightfluctuations.1,whendonetoooften,thishabitcansometimeshurtmorethanit2.Asforme,weighingmyselfeverydaycausedmetoshiftmyfocusfrombeinggenerallyhealthyandphysicallyactivetofocusing3onthescale.Thatwashadtomyoverallfitnessgoats.Ihadgainedweightintheformofmusclemass,butthinkingonlyof4thenumberonthescale,Ialteredmytrainingprogram.ThatconflictedwithhowIneededtotrainto5mygoals.Ialsofoundthatweighingmyselfdailydidnotprovideanaccurate6ofthehardworkandprogressIwasmakinginthegym.Ittakesaboutthreeweekstoamonthtonoticeanysignificantchangesinyourweight7alteringyourtrainingprogram.Themost8changeswillbeobservedinskilllevel,strengthandincheslost.Forthese9,Istoppedweighingmyselfeverydayandswitchedtoabimonthlyweighingschedule10.Sinceweightlossisnotmygoal,itislessimportantformeto11myweighteachweek.Weighingeveryotherweekallowsmetoobserveand12anysignificantweightchanges.ThattellsmewhetherIneedto13mytrainingprogram.Iusemybimonthlyweigh-in14togetinformationaboutmynutritionaswell.Ifmytrainingintensityremainsthesame,butI’mconstantly15anddroppingweight,thisisa16thatIneedtoincreasemydailycaloricintake.The17tostopweighingmyselfeverydayhasdonewondersformyoverallhealth,fitnessandwell-being.I’mexperiencingincreasedzealforworkingoutsinceInolongercarrytheburdenofa18morningweigh-in.I’vealsoexperiencedgreatersuccessinachievingmyspecificfitnessgoals,19I’mtrainingaccordingtothosegoals,notthenumbersonascale.Ratherthan20overthescale,turnyourfocustohowyoulook,feelhowyourclothesfitandyouroverallenergylevel.1.[A]Besides[B]Therefore[C]Otherwise[D]However2.[A]helps[B]cares[C]warns[D]reduces3.[A]initially[B]solely[C]occasionally[D]formally4.[A]recording[B]lowering[C]explaining[D]accepting5.[A]modify[B]set[C]review[D]reach6.[A]definition[B]depiction[C]distribution[D]prediction7.[A]dueto[B]regardlessof[C]asidefrom[D]alongwith8.[A]orderly[B]rigid[C]precise[D]immediate9.[A]claims[B]judgments[C]reasons[D]methods10.[A]instead[B]though[C]again[D]indeed11.[A]track[B]overlook[C]conceal[D]report12.[A]dependon[B]approveof[C]holdonto[D]accountfor13.[A]share[B]adjust[C]confirm[D]prepare14.[A]results[B]features[C]rules[D]tests15.[A]bored[B]anxious[C]hungry[D]sick2019考研英语二真题完整版

2019考研英语真题及答案解析（二）（完整版）

参考答案在最后

Directions:

Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on

the ANSWER SHEET. (10 points)

Weighing yourself regularly is a wonderful way to stay aware of any significant weight fluctuations・ 1 ,when done too often, this habit can sometimes hurl more than it 2 .

As for me, weighing myself every clay caused me to shift my focus from being generally healthy and

physically active to focusing 3 on the scale・ That was bad to my overall fitness goals. I had gained

weight in the form of muscle mass, but thinking only of 4 the number on the scale, I altered my training

program. That conficted with how I needed to train to 5 my goals.

I also found that weighing myself daily did not provide an accurate 6 of the hard work and progress

超级狩猎者整理 业精于勤荒于嬉.

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2019年考研数学（二）真题及完全解析（Word版）

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，只有一个选项符合题目要求的，请将所选项前的字母填在答题纸．．．指定位置上.

1、当0x时，若tanxx与 kx是 同阶无穷小量，则k（ ）

A、 1. B、2. C、 3. D、 4.

【答案】C.

【解析】因为 3tan~3xxx，所以3k，选 C.

2、曲线3sin2cosyxxxx　　－２２的拐点是（ ）

A、,　２２ . B、0,2　 . C、,2　 . D、33,　２２.

【答案】C.

【解析】cossinyxxx　　，sinyxx，令 sin0yxx，解得0x或x。

当x时，0y；当x时，0y，所以,2　是拐点。故选 C.

3、下列反常积分发散的是（ ）

A、0xxedx. B、 20xxedx. C、 20tan1arxxdxx. D、201xdxx.

【答案】D.

【解析】A、00001xxxxxedxxdexeedx，收敛；

B、222001122xxxedxedx，收敛；

C、22200tan1arctan128arxxdxxx，收敛；

D、2222000111(1)ln(1)1212xdxdxxxx，发散，故选D。

2019 年全国硕士研究生招生考试计算机科学与技术学科联考

计算机学科专业基础综合试题

一、单项选择题：1~40 小题，每小题 2 分，共 80 分。下列每题给出的四个选项中，只有一个选项符合试题要求。

1. 设 n 是描述问题规模的非负整数，下列程序段的时间复杂度是x=0； while(n>=(x+l)

*(x+l))

x=x+l；

A. O(log n) B. O(n1/2) C. O(n) D. O(n2)

2. 若将一棵树 T 转化为对应的二又树 BT，则下列对 BT 的遍历中，其遍历序列与 T 的后根遍历序列相同的是

A. 先序遍历 B. 中序遍历 C. 后序遍历 D. 按层遍历

3. 对 n 个互不相同的符号进行哈夫曼编码。若生成的哈夫曼树共有 115 个结点，则 n 的值是

A. 56 B. 57 C. 58 D. 60

4. 在任意一棵非空平衡二又树(AVL 树)T1 中，删除某结点 v 之后形成平衡二又树 T2，再将 w 插入 T2 形成平衡二又树 T3。下列关于 T1 与 T3 的叙述中，正确的是

I.若 v 是 T1 的叶结点，则 T1 与 T3 可能不相同Ⅱ.

若 v 不是 T1 的叶结点，则 T1 与 T3 一定不相同Ⅲ.

若 v 不是 T1 的叶结点，则 T1 与 T3 一定相同

A. 仅 I B. 仅 II C. 仅 I、Ⅱ D. 仅 I、Ⅲ

5. 下图所示的 AOE 网表示一项包含 8 个活动的工程。活动d 的最早开始时间和最迟开始时间分别是

A. 3 和 7 B. 12 和 12 C. 12 和 14 D. 15 和 15

6. 用有向无环图描述表达式(x+y)*((x+y)/x)，需要的顶点个数至少是

A. 5 B. 6 C. 8 D. 9

7. 选择一个排序算法时，除算法的时空效率外，下列因素中，

还需要考虑的是

I.数据的规模 Ⅱ.数据的存储方式 Ⅲ.算法的稳定性 V.数据的初始状态