【优质】考研数学二历年平均分word版本 (2页)

【优质】考研数学二历年平均分word版本 (2页)

【优质】考研数学二历年平均分word版本

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考研数学二历年平均分

导语:平均分与平均数不同,是分物时所用的一种思想。指在分物体的时候,要尽可能地分完,而且还要使每一份得到的数相等。那么,考研数学二历年平均分是多少呢?一起来了解一下!

考研数学二历年平均分

什么是考研数学

一、简介

针对考研的数学科目,根据各学科、专业对硕士研究生入学所应具备的

数学知识和能力的不同要求,硕士研究生入学统考数学试卷分为3种:其中针

对工科类的为数学一、数学二;针对经济学和管理学类的为数学三(201X年之

前管理类为数学三,经济类为数学四,201X年之后大纲将数学三数学四合并)。具体不同专业所使用的试卷种类有具体规定。

二、招生专业

根据工学、经济学、管理学各学科、专业对硕士研究生入学所应具备的数

学知识和能力的不同要求,硕士研究生入学统考数学试卷分为3种,其中针对

工学门类的为数学一、数学二,针对经济学和管理学门类的为数学三。招生专

业须使用的试卷种类规定如下:

一、须使用数学一的招生专业

1.工学门类中的力学、机械工程、光学工程、仪器科学与技术、冶金工程、动力工程及工程热物理、电气工程、电子科学与技术、信息与通信工程、控制

科学与工程、网络工程、电子信息工程、计算机科学与技术、土木工程、测绘

科学与技术、交通运输工程、船舶与海洋工程、航空宇航科学与技术、兵器科

学与技术、核科学与技术、生物医学工程等20个一级学科中所有的二级学科、专业。

2.授工学学位的管理科学与工程一级学科。

二、须使用数学二的招生专业

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Section I Use of English 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 hurt more than it 2 . As for me, weighing myself every day 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 conflicted 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 I was making in the gym. It takes about three weeks to a month to notice any significant changes in your weight 7 altering your training program. The most 8 changes will be observed in skill level, strength and inches lost. For these 9 , I stopped weighing myself every day and switched to a bimonthly weighing schedule 10 . Since weight loss is not my goal, it is less important for me to 11 my weight each week. Weighing every other week allows me to observe and 12 any significant weight changes. That tells me whether I need to 13 my training program. I use my bimonthly weigh-in 14 to get information about my nutrition as well. If my training intensity remains the same, but I’m constantly 15 and dropping weight, this is a 16 that I need to increase my daily caloric intake. The 17 to stop weighing myself every day has done wonders for my overall health, fitness and well-being. I’m experiencing increased zeal for working out since I no longer carry the burden of a 18 morning weigh-in. I’ve also experienced greater success in achieving my specific fitness goals, 19 I’m trai ning according to those goals, not the numbers on a scale. Rather than 20 over the scale, turn your focus to how you look,

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【答案】D 【解析】特值法:(A )取n x π=,有limsin 0,lim n n n n x x π→∞→∞ ==,A 错; 取1n x =-,排除B,C.所以选D. (4)微分方程的特解可设为 (A )22(cos 2sin 2)x x Ae e B x C x ++ (B )22(cos 2sin 2)x x Axe e B x C x ++ (C )22(cos 2sin 2)x x Ae xe B x C x ++ (D )22(cos 2sin 2)x x Axe e B x C x ++ 【答案】A 【解析】特征方程为:2 1,248022i λλλ-+=?=± 故特解为:***2212(cos 2sin 2),x x y y y Ae xe B x C x =+=++选C. (5)设(,)f x y 具有一阶偏导数,且对任意的(,)x y ,都有(,)(,)0,0f x y f x y x y ??>>??,则 (A )(0,0)(1,1)f f > (B )(0,0)(1,1)f f < (C )(0,1)(1,0)f f > (D )(0,1)(1,0)f f < 【答案】C 【解析】(,)(,)0,0,(,)f x y f x y f x y x y ??>

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