当前位置:文档之家› 天大2018年12月考试《西方经济学》离线作业考核试题(第一组答案)

天大2018年12月考试《西方经济学》离线作业考核试题(第一组答案)

天大2018年12月考试《西方经济学》离线作业考核试题(第一组答案)

西方经济学 要求:

一、独立完成,下面已将五组题目列出,请按照学院平台指定..

的做题组数作答, 每人只...答.一组题目....,多答无效....

,满分100分; 平台查看做题组数操作:学生登录学院平台→系统登录→学生登录→课程考试→离线考核→离线考核课程查看→做题组数,显示的数字为此次离线考核所应做哪一组题的标识;

例如:“做题组数”标为1,代表学生应作答“第一组”试题;

二、答题步骤:

1. 使用A4纸打印学院指定答题纸(答题纸请详见附件);

2. 在答题纸上使用黑色水笔....按题目要求手写..

作答;答题纸上全部信息要求手写,包括学号、姓名等基本信息和答题内容,请写明题型、题号; 三、提交方式:请将作答完成后的整页答题纸以图片形式依次粘贴在一个.......Word .... 文档中...

上传(只粘贴部分内容的图片不给分),图片请保持正向、清晰; 1. 上传文件命名为“中心-学号-姓名-科目.doc ”

2. 文件容量大小:不得超过20MB 。

提示:未按要求作答题目........的作业...及雷同作业.....,成绩以....0.分记..

题目如下:

第一组:

一、问答题(每小题20分,共60分)

1. 什么是管制价格?作图说明管制价格的种类及其对经济的影响。

分为支持价格(最低限价)

和限制价格(最高限价)两种。 支持价格高于市场均衡价格, 限制价格低市场均衡价格。 管制价格对经济的影响可用下图表示。

在图中,P 为价格,Q 为数量。P 1为支持价格。P 0为均衡价格。P 1>P 0,能支持供给,但易造成滞销。P 2为限制价格,P 2

天津大学—应用统计学离线作业及答案

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2、某一汽车装配操作线完成时间的计划均值为2.2分钟。由于完成时间既受上一道装配操作线的影响,又影响到下一道装配操作线的生产,所以保持2.2分钟的标准是很重要的。一个随机样本由45项组成,其完成时间的样本均值为2.39分钟,样本标准差为0.20分钟。在0.05的显著性水平下检验操作线是否达到了 2.2分钟的标准。96 .1 2 = α μ 3、设总体X的概率密度函数为 2 (ln) 2,0 (,)2x 0,0 x x f x x μ μπ - - ? > = ≤ ? 其中μ为未知参数,n X X X,..., , 2 1是来自X的样本。(1)试求1 3 ) (+ =μ μ g的极大似然估计量) (g?μ;(2)试验证) (g?μ是) (μ g的无偏估计量。

4、某商店为解决居民对某种商品的需要,调查了100户住户,得出每月每户平均需要量为10千克,样本方差为9。若这个商店供应10000户,求最少需要准备多少这种商品,才能以95%的概率满足需要? 5、根据下表中Y与X两个变量的样本数据,建立Y与X的一元线性回归方程。 Y ij f X 5101520 y f 1200081018 140343010

2018年12月四级真题(一)解析

Part I Writing(30 minutes) The Challenges of Living in a Big City 【1】With the development of economy and urbanization, the number of cities is constantly increasing in China.【2】While big cities are attracting more and more people, they also bring many challenges,such as traffic jam and pollution,just to name a few.【3】The first problem that really bothers me is the traffic congestion in the rush hour. I hate waiting for buses and being late.Therefore, I have to get up very early if I have an appointment in the morning.【4】Next is that the large population in a big city makes it【5】so crowded that you can't find a peaceful place unless staying at home. The supermarkets are always crowded, so are the cinemas and parks. parks.【6】Another consequence for such a large population is that it intensifies the inadequacy of quality medical and educational resources, thus decreasing residents' sense of happiness. 【7】As a result, although I am frequently asked whether I like to live in a big city or not, my answer is always no, definitely not, How about you? 话题词汇: unsatisfactory不满意的leisure娱乐opportunity机会 fast pace快节奏 pressure压力 lifestyle生活方式 environment环境 urban城市的 health健康 Part III Reading Comprehension Section A 【词性分析】: 名词: A) ability能力;才能; E) control控制;管制;F) damage伤害;损害; M) sources来源;根源;O) vehicles交通工具,车辆 动词:B) associated与…相关;联系;E) control管理;控制;克制;F) damage损害;对……有不良影响G) described描绘,描述; H equals相当于;比得上;) innovated创新,革新;L) relates相联系;把…系起来;M) sources来自……;找出…的来源;N) undermine逐渐削弱 形容词:D) constant持续不断的;始终如一的 副词:C) consciously有意识地,自觉地; 1) exclusively仅仅,唯独;K) regularly经常;定期地 Millions die early from air pollution each year. Air pollution costs the global economy more than $5 trillion annually in welfare costs, with the most serious 26-damage occurring in the developing world. The figures include a number of costs 27-associated with air pollution. Lost income alone amounts to $225 billion a year. 1.die v. 死亡,熄灭; 凋零n.骰子 2.trillion[?tr?lj?n]n. 万亿; 兆adj.万亿的 3.welfare [?welfe?(r)] n. 福利; 幸福; 繁荣; 安宁 4.alone [??l??n] adj. 单独的; 独一无二的; 独自的adv. 单独地; 独自地; 孤独地; 只,只有; The report includes both indoor and outdoor air pollution. Indoor pollution, which includes 28-sources like home heating and cooking, has remaine d 29-constant over the past several decades despite advances in the area. Levels of outdoor pollution have grown rapidly along with rapid growth in industry and transportation. 5.source [s?rs] n. 根源,本源; 源头,水源; 原因v. 来源; 起源; 寻求来源 6.remain [r??men]n.剩余物,残骸; 残余; 遗迹; 遗体v.留下; 保持;依然; 搁置; 剩余,剩下; 逗留 7.constant [?k?nst?nt] adj. 不断的,持续的; 永恒的,始终如一的; 坚定; 忠实的n.常量; 不变的事物

2018年12月四级真题第二套

2018年12月大学英语四级考试真题(第2套) Part I Writing(30minutes) Directions:For this part,you are allowed30minutes to write a short essay on the challenges of studying abroad.You should write at least120words but no more than180words. ___________________________________________________________________________________________________ ___________________________________________________________________________________________________ ___________________________________________________________________________________________________ Part II Listening Comprehension(25minutes) Section A Directions:In this section,you will hear three news reports.At the end of each news report,you will hear two or three questions.Both the news report and the questions will be spoken only once.After you hear a question,you must choose the best answer from the four choices marked A),B),C)and D).Then mark the corresponding letter on Answer Sheet1with a single line through the centre. Questions1and2are based on the news report you have just heard. 1.A)A man was pulled to safety after a building collapse. B)A beam about ten feet long collapsed to the ground. C)A rescue worker got trapped in the basement. D)A deserted100-year-old building caught fire. 2.A)He suffered a fatal injury in an accident. B)He once served in a fire department. C)He was collecting building materials. D)He moved into his neighbor’s old house. Questions3and4are based on the news report you have just heard. 3.A)Improve the maths skills of high school teachers. B)Change British people’s negative view of maths. C)Help British people understand their paychecks. D)Launch a campaign to promote maths teaching. 4.A)Children take maths courses at an earlier age. B)The public sees the value of maths in their life. C)British people know how to do elementary calculations. D)Primary school teachers understand basic maths concepts. Questions5to7are based on the news report you have just heard. 5.A)He owns a fleet of aircraft. B)He is learning to be a pilot. C)He regards his royal duties as a burden. D)He held a part-time job for over20years. 6.A)He can demonstrate his superior piloting skills. B)He can change his focus of attention and relax. C)He can show his difference from other royalty. D)He can come into closer contact with his people. 7.A)They enjoyed his company.

管理学答案 天大离线大作业

管理学答案 论述题: 1.说明当今企业制定战略计划的重要性 20世纪70年代之前,企业赖以生存的环境是一个相对稳定的环境。管理者们深信未来会更加美好,因此,面向未来的长期计划是过去计划自然的向前延伸。但是,进入20世纪70年代以后,企业所面临的环境发生了根本性的变化,环境变得越来越风云变幻,具体表现为:科学技术日新月异,新技术、新产品层出不穷;市场需求变化日益加快,并朝着多样化、个性化方向发展;社会、政治、经济环境复杂多变。面对瞬息万变的环境,人们发现,企业依靠传统的计划方法来制定未来的计划显得不合时宜了,企业要谋求长远的生存和发展,就必须审时度势地对外部环境的可能变化做出预测和判断,准确把握未来,制定出正确的战略计划。 2.你认为传统的组织设计的原则在今天还适用吗?请进行 讨论。 本节我们探讨5条基本的组织设计原则,它们一直指导着组织设计工作。同时也说明为了反映组织活动的日益复杂多变,这些原则是如何得到修正的。一般管理的理论家所提出的组织设计的经典概念,为管理者从事组织设计提供了一套可遵循的原则。从这些原则提出至今,近一个世纪过去了,社会发生了巨大变化,但这些原则中的大部分仍然对我们设计一个有效运作的组织具

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2018年12月英语四级考试参考答案(全三套)

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天大2018年12月考试《运筹学》离线作业考核试题(第三组答案)

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