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北邮第二阶段作业

北邮第二阶段作业
北邮第二阶段作业

北邮第二阶段作业

一、判断题(共10道小题,共50.0分)

1.企业家的创新是超额利润的源泉之一。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[A;]

得分: [5] 试题分

值:

5.0

提示:

2.甲、乙两国的基尼系数分别为0.1和0.2,那么甲国的收入分配要比乙国平等。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[A;]

得分: [5] 试题分

值:

5.0

提示:

3.由于寡头之间可以进行勾结,所以,他们之间并不存在竞争。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[B;]

得分: [5] 试题分

值:

5.0

提示:

4.在完全竞争市场上,整个行业的需求曲线是一条与横轴平行的线。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[A;]

得分: [5] 试题分

值:

5.0

提示:

5.收益就是利润,因此收益最大化就是利润最大化。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[B;]

得分: [5] 试题分

值:

5.0

提示:

6.在消费者的收入和商品的价格一定的条件下,预算约束线是一条确定的直线。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[A;]

得分: [5] 试题分

值:

5.0

提示:

7.如果边际效用递减,则总效用下降。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[B;]

得分: [5] 试题分

值:

5.0

提示:

8.实证经济分析与规范经济分析的区别在于是否以一定的价值判断位基础。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[A;]

得分: [5] 试题分

值:

5.0

提示:

9.一般来讲,生活必需品的弹性是小于1的,这说明消费者在此类商品低价时的总支出

将小于高价时的总支出。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[A;]

得分: [5] 试题分

值:

5.0

提示:

10.微观经济学要解决的问题是资源利用,宏观经济学要解决的问题是资源配置。

A.正确

B.错误

知识点: 微观经济学基础

学生答

案:

[B;]

得分: [5] 试题分

值:

5.0

提示:

11.

二、单项选择题(共10道小题,共50.0分)

1.收入分配绝对平均时,基尼系数:()。

A.等于零

B.等于一

C.大于零小于一

知识点: 微观经济学基础

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countries. A.produces both B.both produce C.produce both D.both produces 知识点: Unit2assignment 学生答案: [C;] 标准答 案: C 得分: [10] 试题分 值: 10.0 提示: 4.I ________ his offer, but I didn’t ________ it. A.receive...accept B.received…accepted C.accepted…received D.received…accept 知识点: Unit2assignment 学生答案: [D;] 标准答 案: D 得分: [10] 试题分 值: 10.0 提示: 5.Although your offer for the house is $200 below the asking ________, they’ll probably accept for the sake of a quick sale. A.cost

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作业9 一、单项选择题(共5道小题,共5.0分) 1 不属于公钥密码的典型算法是() 1RSA 1DSA 13DES 1DH 知识点:八、信息安全与网络道德 学生答案:[C; ] 标准答 案: C 得分:[1]试题分 值: 1.0 提示: 2 知识产权包括() 1著作权和工业产权 1著作权和专利权 1专利权和商标权 1商标权和著作权 知识点:八、信息安全与网络道德 学生答案:[A; ] 标准答 案: A 得分:[1]试题分 值: 1.0 提示: 3 (错误) 计算机病毒是计算机系统中一类隐藏在()上蓄意破坏的捣乱程序。 1内存 1软盘 1存储介质 1网络 知识点:八、信息安全与网络道德 学生答案:[A; ] 标准答 案: C

得分:[0]试题分 值: 1.0 提示: 4 网络协议的关键成分是() 1硬件、软件与数据 1语法、语义和体系结构 1语法、定时、层次结构 1语法、语义和定时 知识点:八、信息安全与网络道德 学生答案:[D; ] 标准答 案: D 得分:[1]试题分 值: 1.0 提示: 5 技术安全需求集中在对计算机系统、网络系统、应用程序的控制之上,而技术安全控制的主要目的是保护组织信息资产的() 1完整性 1可用性 1机密性 1上面三项都是 知识点:八、信息安全与网络道德 学生答案:[D; ] 标准答 案: D 得分:[1]试题分 值: 1.0 提示: 作业10 一、单项选择题(共5道小题,共5.0分) 6 下面()属于三维动画制作软件工具。 13DS MAX 1Firworks 1Photoshop 1Authorware

学生答案:[A; ] 标准答 案: A 得分:[1]试题分 值: 1.0 提示: 7 下面()不是多媒体创作所必须的硬件设备。 1扫描仪 1数码相机 1彩色打印机 1图形输入板 知识点:九、计算机多媒体技术 学生答案:[C; ] 标准答 案: C 得分:[1]试题分 值: 1.0 提示: 8 下面硬件设备中,哪些不是多媒体硬件系统必须包括的设备。 1计算机最基本的硬件设备 1CD-ROM 1音频输入、输出和处理设备 1多媒体通信传输设备 知识点:九、计算机多媒体技术 学生答案:[D; ] 标准答 案: D 得分:[1]试题分 值: 1.0 提示: 9 下面()不是多媒体计算机中常用的图像输入设备: 1数码照相机 1彩色扫描仪 1条码读写器 1彩色摄象机

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1. China has hundreds of islands,________ the largest is Taiwan. 正确答案:C 题目注释 A . in which B . at which C . of which D . from which √2. I can still remember the sitting-room_______ mother and I us ed to sit in the evening 正确答案:D 题目注释 A . which B . what C . that D . where √3. He had two sons, both ________ died in the war. 正确答案:B 题目注释 A . of them B . of whom C . who D . them √4. I wrote to him the day before yesterday. I wonder why he__________ 正确答案:C 题目注释 A . didn't ring up B . hadn't rung up C . hasn't rung up D . doesn't ring up

√5. Anyone ______ this opinion may speak out. 正确答案:C 题目注释 A . that againsts B . that against C . who is against D . who are against √6. _____ that not all government officials are honest. 正确答案:A 题目注释 A . It seems to me B . My believing is C . In my opinion, I believe D . I think in my mind √7. ______ , he knows how to live and study. 正确答案:C 题目注释 A . A child as he is B . As he is a child C . Child as he is D . Though he is child √8. The retiring teacher made a speech ________ she thanked the class for the gift 正确答案:C 题目注释 A . which B . of which C . in which D . that

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一、阅读理解(共1道小题,共50.0分) 1.Americans with small families own a small car or a large one. If both parents are working, they usually have two cars. When the family is large, one of the cars is sold and they will buy a van(住房汽车) A small car can hold four persons and a large car can hold six persons but it is very crowded. A van hold seven persons easily, so a family with three children could ask their grandparents to go on a holiday travel. They could all travel together. Mr. Hagen and his wife had a third child last year. This made them sell a second car and buy a van. The sixth and seventh seat are used to put other things, for a family of five must carry many suitcases when they travel. Americans call vans motor homes. A motor home is always used for holidays. When a family are traveling to the mountains or to the seaside, they can live in their motor home for a few days or weeks. All the members of a big family can enjoy a happier life when they are traveling together. That is why motor homes have become very popular. In America there are many parks for motor homes. 1. From the passage, a motor home is also called ______. A. a motor car B. a motorbike C. a big truck D. a van 2. A family owns a motor home usually with ______. A. more than two children B. interest in vans C. a baby D. much money 3. Americans with a small family and with two parents working usually have ______. A. a car B. two cars C. two vans D. a van 4. What is the main use of motor homes for Americans? A. to do some shopping with all the family members B. to drive their children to school every day

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5. 一般来讲,信杂比大于75分贝的即为甲级摄像机,反之则为乙级摄像机。 A. 正确 B. 错误 二、多项选择题(共5道小题,共25.0分) 1. 前向预测被用于:()。 A. I图像 B. P图像 C. B图像 D. A图像 2. MPEG的系列标准中正式推广的有:()。 A. MPEG-1 B. MPEG-2 C. MPEG-3 D. MPEG-4

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A . anyone else B . anything C . some of the things D . anything else A . more larger, all B . much larger, that C . very larger, both D . larger, those

A . flooded B . were flooded C . was flooded D . flood √4. A . being B . C . having D . having A . happened to see B . was happened to see C . happened to be seen D . was happened to be seen

A . rather B . enough C . quite a D . fairly A . the much best B . much the most best C . the very best D . very the best A . will put off

B . will be put off C . will be put D . has put off A . When B . What time C . How often D . How long A . take good care of B . has taken good care of C . took good care of D . are taken good care of

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5.高性能的视频采集卡一般具有一个复合视频接口和一个S—Video接口,以便与模拟视

频设备相连。 A.正确 B.错误 、多项选择题(共5道小题,共25.0分) 1.对于B图像,其宏块有:()。 A. 帧内宏块,简称I块 B. 前向预测宏块,简称F块 C. 后向预测宏块,简称B块 D. 平均宏块,简称A块 2.显像管显示器的标称尺寸:()。 A. 实际上是显像管的尺寸; B. 显示器可视范围比标称尺寸大; C. 显示器可视范围与标称尺寸相等; D. 显示器可视范围比标称尺寸小; 3.SVCD/CVD(PAL制式)常用MPEG —2哪个等级的图像分辨率:()。 A.1/2D1 (352 X 576) B.2/3D1 (480 X 576) C.3/4D1 (528 X 576) D.D1(720 X 576)

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(2)计算sk(累计概率相加) (3)将sk表示成以分母为7的分数(因为有8个像素点,如果有n个就表示成n-1的分数) (4)合并

(5)作出均衡化后的图 5. 计算如下: 结果:黑色的变成灰度级为4/7,灰色的变成白色,灰度级为1 6.

用3*3的中值滤波:计算得到如下结果 1 1 1 8 7 4 2 2 4 3 3 3 3 3 3 3 3 3 3 3 4 4 6 6 3 3 4 5 7 8 2 3 4 6 7 8 1 1 1 8 7 4 2 2 3 3 3 3 3 3 3 3 3 3 3 3 4 4 5 6 3 3 4 5 7 8 2 3 4 6 7 8 7.求下列图像的边缘 2 1 3 4 2 4 2 5 2 3 3 3 78 34 55 4 6 53 63 3 2 3 2 4 6 2 3 4 5 5 3 3 5 3 6 3 4

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