计算机等级考试四级数据库工程师2015年3月模拟试题(五)真题及参考答案

2015年3月计算机四级数据库工程师模拟试题（五）真题

及参考答案

一、选择题：(共70题，每题1分，满分70分。其中1-55题为中文题，56-70题为英文题。)下列各题A)、B)、C)、D)四个选项中，只有一个是正确的，请将正确选项涂写在答题卡相应位置上，答在试卷上不得分。

(1) 为了保证程序能连续执行，CPU必须确定下一条指令的地址，起到这一作用的是

A.指令寄存器

B.状态寄存器

C.地址寄存器

D.程序计数器

(2) 下列关于Cache的描述中，哪一个是错误的?

A.Cache是缓冲技术在存储体系中的一个具体应用

B.Cache的主要特点之一是存储容量大

C.Cache处于内存和CPU之间

D.Cache中一般存放内存的一部分副本

(3) 计算机具有灵活性和通用性特征，能求解各种不同的计算和逻辑问题，这主要是取决于计算机的

A.快速运算

B.指令系统

C.可编程性

D.输入输出设备

(4) 栈结构不适用于下列哪一种应用?

A.表达式求值

B.快速排序算法的实现

C.树的层次次序周游算法的实现

D.二叉树对称序周游算法的实现

(5) 设一棵二叉树中，度为1的结点数为9，则该二叉树的叶结点的数目为

A.10

B.11

C.12

D.不确定

(6) 如下所示是一个带权的图，图中结点A到结点D的关键路径的长度为

A.13

B.15

C.28

D.58

(7) 设散列表的地址空间为0到10，散列函数为h(k)= k mod 11，用线性探查法解决碰撞。现从空的散列表开始，依次插入关键码值95，14，27，68，60，则最后一个关键码60的地址为：

A.4

B.5

C.6

D.7

(8) 没有关键码序列(Q，G，M，Z，A，N，B，P，X，H，Y，S，L，T，K，E)，采用二路归并排序法进行排序，下面哪一个序列是第二趟归并后的结果?

A.G Q，M Z A N，B，P H，X S，Y，L，T，E，K

B.G，M，Q，Z，A，B，N，P，H，S，X，Y，E，K，L，T

C.G，M，Q，A，N，B，P，X，H，Y，S，T，L，K，E，Z

D.A，B，G，M，N，P，Q，Z，E，H，K，L，S，T，X，Y

(9) 下列命题中是简单命题(或称原子命题)的为

A.张明和张红都是大学生

B.张葆丽和张葆华是亲姐妹

C.张晖或张旺是河北省人

D.王际大不是工人

(10) 设p:天下大雨，q:我骑自行车上班。命题“除非天下大雨，否则我骑自行车上班”的符号化形式为

A.p→q

B.┐q→p

C.q→p

D.┐p→┐q

(11) 设集合A={a,b,c}，A上的二元关系R={,}，下面命题中为的是

A.R是对称的

B.R是反对称的

C.R是等价关系

D.R不是偏序关系

(12) 下列四组数中，可以充当4阶无向简单图度数列的为

A.1，2，3，4

B.0, 2，2，3

C.1，1，2，2

D.1，3，3，3

(13) 下列命题中为真的是

A.任意n阶无向图的最大度△≤n

B.欧拉回路都是初级回路

C.若无向图G是n阶m条边r个面的平面图，则n-m+1=2

D.若T为非平凡的无向树，则T中每条边都是桥

(14) 在下列代数系统(A，*)中，不是群的为

A.A={1,10}，*为模11乘法

B.A={1,3,4,5,9}，*为模11乘法

C.A为实数集合，*为普通乘法

D.A为有理数集合，*为普通加法

(15) 下列关于分布式系统的叙述中，不正确的是

A.分布式操作系统是一个统一的操作系统

B.分布式系统中的各个计算机有主次之分

C.分布式系统中各个计算机相互协作共同完成一项任务

D.分布式操作系统有更高的可靠性

(16) 进程由各个部分组成，下列项目中哪一个不属于进程的组成部分?

A.进程控制块

B.程序模块

C.就绪队列

D.数据集合

(17) 预防死锁的方法，通常是破坏产生死锁的四个必要条件之—。但下列哪一个条件不能破坏?

A.占有并等待

B.互斥

C.不可抢夺

D.循环等待

第18—19题基于以下描述内容。在页式存储管理中，可以用“字位映像图”(又称位示图)表示内存空闲块状况。假设字长为32位，每一位(编号为0-31)与一个内存块对应，取值可为0或1。当取值为1时表示对应块已被占用，当取值为0时表示对应块为空闲。

(18) 如果内存可分配区被划分为1024块，则“字位映像图” 共需要多少个字来表示?

A.15

B.16

C.31

D.32

(19) 已知某一位的字号是5，位号为14，假设字号也从0开始编号。则对应的内存块号是多少?(假设内存块从0开始编号)

A.70

B.105

C.174

D.224

(20) 存储管理中，下列说法中正确的是

A.无论采用哪种存储管理方式，用户使用的逻辑地址均是连续的

B.动态重定位一定要有硬件地址转换机制作支持

C.段表和页表都是由用户根据作业情况而建立的

D.采用静态重定位可实现程序浮动Ⅲ.

(21) 当多个访问磁盘的请求同时到达时，为了改善平均磁盘胜势时间，可以采用适当的磁盘调度算法，以减少磁盘服务的总时间。下列各项时间中，哪一项是不能改善的?

Ⅰ.寻道时间

Ⅱ.旋转延迟时间

Ⅲ.数据传送时间

A.只有Ⅰ

B.只有Ⅱ

C.只有Ⅲ

D.没有

(22) 系统调用是操作系统向用户提供的程序一级的服务。用户编制程序时。调用系统调用命令，该命令经过编译后，形成若干参数和

A.访管指令

B.启动I/O指令

C.屏蔽中断指令

D.通道指令

(23) 下列关于UNIX操作系统的叙述中，不正确的是

A.UNIX是一个多用户的系统

B.UNIX的普通文件是无结构字符流文件

C.SHELL既表示一种程序设计语言，又表示一种命令解释程序

D.输人输出重定向是把一个程序的标准输出与另一个程序的标准输入连接在一起

(24) 软件工程思想产生于解决20世纪60年代的软件危机，下述

Ⅰ.软件需求定义不准确

Ⅱ.软件进度难以控制

Ⅲ.软件生产的高成本

Ⅳ.软件质量不易保证

哪些是当时软件危机的主要表现?

A.Ⅰ和Ⅱ

B.Ⅱ和Ⅲ

C.Ⅲ和Ⅳ

D.全部

(25) 应用软件开发是软件开发的主要组成部分，下述Ⅰ.缺少方法论指导

Ⅱ.没有完整的工具

Ⅲ.用户需求的多变

Ⅳ.系统分析员不足

哪个是应用软件开发中存在的主要困难?

A.只有Ⅰ

B.只有Ⅱ

C.只有Ⅲ

D.只有Ⅳ

(26) 经过软件工程实践，人们积累了较为丰富的经验，并逐渐走向明确的软件开发阶段的划分，当前最为成熟的阶段应是

A.编程阶段

B.分析阶段

C.设计阶段

D.测试阶段

(27) 数据流图可用于抽象描述一个软件的逻辑模型，并由若干种基本的图形符号组成，下述图名

Ⅰ.加工

Ⅱ.数据流

Ⅲ.数据存储

Ⅳ.外部实体

哪些是构成数据流图的基本图形?

A.Ⅰ、Ⅱ和Ⅲ

B.Ⅱ、Ⅲ和Ⅳ

C.Ⅱ和Ⅲ

D.全是

(28) 软件设计是软件开发的重要组成阶段，也是软件需求分析阶段的继续，下述

Ⅰ.软件结构

Ⅱ.软件过程

Ⅲ.软件模块

Ⅳ.软件文档

哪些是软件设计阶段所应包含的内容?

A.Ⅰ和Ⅱ

B.Ⅱ和Ⅲ

C.Ⅰ、Ⅱ和Ⅲ

D.全是

(29) 软件工程环境按其所支持软件生产周期的不同阶段而不同。而支持软件测试的环境应是

A.软件开发环境

B.项目管理环境

C.质量保证环境

D.软件维护环境

(30) 原型化方法是软件开发中不同于结构化方法的另一种方法，该方法的着重点是用以

A.定义软件需求

B.重用已有软件

C.进行初步设计

D.提高编码进度

(31) 软件测试是软件开发中极其重要的组成内容，下述Ⅰ.软件功能

Ⅱ.软件结构

Ⅲ.软件性能

哪些属于软件测试的应有内容?

A.Ⅰ和Ⅱ

B.Ⅰ和ⅢC)Ⅱ和Ⅲ

D.全部

(32) 软件质量保证实施应贯彻软件开发的全过程，下述Ⅰ.阶段复审

Ⅱ.材料复审

Ⅲ.软件测试

Ⅳ.管理复查

哪些是软件质量保证的必要措施?

A.Ⅰ和Ⅱ

B.Ⅱ和Ⅲ

C.Ⅰ、Ⅱ和Ⅲ

D.全部

(33) 1970年对IBM公司的 E.F.Codd提出了数据库的

A.层次数据模型

B.关系数据模型

C.网状数据模型

D.面向对象数据模型

(34) 如下所列的概念中，哪一个不是数据库系统通常采用的三级模式结构?

A.用户模式，模式，逻辑模式

B.子模式，模式，存储模式

C.外模式，模式，内模式

D.用户模式，模式，存储模式

(35) 设两个关系C和SC如下，它们的主键分别为C#和(S#，C#)，且

C.C#=SC.C#。若要对关系C执行删除操作，下面给出关系C的四个元组中哪个元组可以被删除?

C SC

C# CNAME TEACHER S# C# GRADE

c1c2c3c4 databasenetworkosmis zhanglingwuchen 003001001021007345003069 c1c2c3c4 887895

A.C#=c1

B.C#=c2

C.C#=c3

D.C#=c4

(36) 下列因素中哪些与数据库系统的运行效率有关?

Ⅰ.功能是否齐全

Ⅱ.容错纠错能力

Ⅲ.数据库设计是否合理

Ⅳ.程序可读性

Ⅴ.算法

Ⅵ.编程技巧

A)Ⅰ、Ⅱ、Ⅲ和ⅤB)Ⅰ、Ⅳ、Ⅴ和Ⅵ

C.Ⅱ、Ⅲ、Ⅴ和Ⅵ

D.都是

(37) 下列哪些工作是数据库系统实施的内容?

Ⅰ.建立数据库

Ⅱ.组织数据人库

Ⅲ.调试测试应用程序

Ⅳ.数据库性能监测和改善

Ⅴ.增加新功能

A.都是B)Ⅰ、Ⅱ、Ⅲ和Ⅴ

C.Ⅲ、Ⅵ和Ⅴ

D.Ⅰ、Ⅱ和Ⅲ

(38) 在ORACLE数据库系统中为了提高查询速度，通过一种结构可以将两个或两个以上表组合在一起存放，这种结构称为

A.视图(view)

B.索引(index)

C.聚簇(cluster)

D.触发器(trigger)

(39) 数据库管理系统的并发控制机制的功能是负责协调并发事务的正确执行，从而保证数据库的

A.一致性

B.可靠性

C.可恢复性

D. 安全性

(40) 在SQL语言中，如果要建立一个工资表，包含职工号、姓名、职称、工资等字段。若要保证“工资”字段的取值不低于800元，最合适的实现方法是

A.在创建工资表时为‘“工资”字段建立缺省(default)

B.在创建工资表时为“工资”字段建立检查约束(check constraint)

C.在工资表上建立一个触发器(trigger)

D.为工资表数据输入编写一个程序进行控制

(41) 在关系数据库设计中，使每个关系达到某一范式。这是哪个设计阶段的任务?

A.需求分析

B.概念设计

C.逻辑设计

D.物理设计

(42) 在指令编码设计过程中，虽然有最优化的编码方法，但人们仍采用

A.ASCII码进行指令编码

B.BCD码进行指令编码

C.哈夫曼码进行指令编码

D.等长扩展码进行指令编码

(43) 寄存器窗口重叠技术是RISC的关键技术，这项技术能很好地支持过程调用和返回操作。这里所谓的重叠是指

A.高位寄存器与低位寄存器重叠

B.高位寄存器与局部寄存器重叠

C.全局寄存器与局部寄存器重叠

D.全局寄存器与高位寄存器重叠

(44) 奔腾处理器已普遍采用超标量流水线技术。所谓超标量技术就是

A.把普通流水线的主频提高

B.多建立几条流水线而已

C.不采用多指令分发技术

D.细化流水、增加级数

(45) 下列哪种结构是把指令和数据混合进行存储的

A.哈佛结构

B.马克结构

C.冯.诺依曼结构

D.非冯.诺依曼结构

(46) 虚拟存储系统的页式管理。每个页都是一个

A.等长模块

B.等长页面

C.逻辑实体

D.模块实体

(47) 高速并行结构的种类很多。在下述结构中，硬件效率最高而软件需求量最少的是

A.专用多功能单元

B.阵列处理机

C.数据流计算机

D.多处理机系统

(48) 所谓I/O操作是指内存与I/O设备之间进行信息交换。在I/O方式的发展过程中，对CPU依赖程度最高的I/O操作是

A.通道控制

B.中断控制

C.程序控制

D.DMA控制

(49) 计算机网络按照其覆盖的地理范围可以分为哪几种基本类型?

Ⅰ.局域网

Ⅱ.城域网

Ⅲ.数据通信网

Ⅳ.广域网

A.Ⅰ和Ⅱ

B.Ⅲ和Ⅳ

C.Ⅰ、Ⅱ和Ⅲ

D.Ⅰ、Ⅱ和Ⅳ

(50) 计算机网络拓扑是通过网中结点与通信线路之间的几何关系来反映出网络中各实体间的

A.逻辑关系

B.服务关系

C.结构关系

D.层次关系

(51) 由于连接多台计算机之间的线路结构可能是复杂的，因此决定分组如何从通信子网的源结点到达目的结点时需要使用

A.拥塞算法

B.路由选择算法

C.差错控制算法

D.排队算法

(52) 在网络环境中进行大型科学计算、信息处理时，需要数据通信网能提供较高的带宽。这一类数据通信具有哪些主要特征?

Ⅰ.通信量大

Ⅱ.顺序性

Ⅲ.突发性

Ⅳ.层次性

A.Ⅲ和Ⅳ

B.Ⅰ和Ⅲ

C.Ⅰ、Ⅱ和Ⅳ

D.Ⅱ和Ⅳ

(53) IEEE 802标准所描述的局域网参考模型对应于OSI参考模型的哪一(几)层?

Ⅰ.逻辑链路控制层

Ⅱ.数据链路层

Ⅲ. 网络层

Ⅳ.物理层

A.只有Ⅱ

B.Ⅱ、Ⅲ和ⅣC)Ⅱ和Ⅳ

D.Ⅰ、Ⅱ和Ⅲ

(54) 与快速以太网Fatt Ethernet相同之处是：千兆位以太Gigabit Ethernet同样保留着传统的10 Mbps Ethernet的基本特征，而且把每个比特的发送时间降低为

A.100ns

B.10ns

C.0.1ns

D.1ns

(55) Internet的基本服务，如电子邮件E-mail、远程登录Telnet、文件传输FTP与WWW浏览等，它们的应用软件系统设计中都采用了

A.客户机/服务器结构

B.逻辑结构

C.层次模型结构

D.并行体系结构

(56) An instruction that uses indrect addressing mustt contain an address of memory where

A.data is stored

B.a pipeline stall will be executed

C.a page fault is addressed

D.another address is stored

(57) The principle for a stack memory to store data is

A.FIFO

B.FILO

C.random

D.other way

(58) In the forest corresponding to the following binary tree，how many children does node B have?

A.1

B.2

C.3

D.4

2015年12月英语四级真题及答案第一套

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2015年12月英语四级真题及答案1

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（听力与第二套一样） 阅读理解 Questions 36 to 45 are based on the following passage. Children do nit think the way adults do. For most of the first year of life, if something is out of sight，it's out of mind. lf you cover a baby's 36 toy with a piece of cloth，the baby thinks the toy has disappeared and stops looking for it. A 4-year-old may 37 that a sister has more fruit juice when it is only the shapes of the glasses that differ，not the 38 of juice. Yet children are smart in their own way.Like good little scientists，children are always testing their child-sized 39 about how things work. When your child throws her spoon on the floor for the sixth time as you try to feed her，and you say，"That's enough! I will not pick up your spoon again!”the child will 40 te st your claim.Are you serious?Are you angry? What will happen if she throws the spoon again? She is not doing this to drive you 41 ;rather，she is learning that her desires and yours can differ，and that sometimes those 42 important and sometimes they are not How and why does children's thinking change?In the 1920s，Swiss psychologist Jean Piaget proposed that children's cognitive (认知的) abilities unfold 43 ，like the blooming of a flower，almost independent of what else is 44 their lives.Although many of his specific conclusions have been 45 or modified over the years, his ideas inspired出ousands of studies by investigators all over the world. A) advocate E) deflnite I) irrunediately M) protest B) amount F) differences J) naturally N) rejected C) confirmed G) favorite K) obtaining O) theories D) crazy H) happening L) primarily 2.长篇阅读（匹配意思相近的选项） Section B The Perfect Essay [A] Looking back on too many years of education，I can identify one truly impossible teacher. She cared about me，and my intellectual life，even when I didn't. Her expectations were high-impossibly so. She was an English teacher. She was also my mother. [B] When good students turn in an essay，they dream of their instmctor returning .it to them in exactly the same condition，save for a single word added in仕le margin of the flnal page: "Flawless." This dream came true for me one afternoon in the ninth grade. Of course，I had heard that genius could show itself at an early age，so I was only slightly taken aback that I had achieved perfection at the tender age of 14. Obviously，I did what any professional writer would do; I hurried off to spread the good news. I didn’t get very far.The flrst person I told was my

2019年12月大学英语四级阅读真题及答案

2019年12月大学英语四级阅读真题及答案 2015年12月大学英语四级阅读真题及答案 【参考答案】 36、N。 saw 第一空显然缺少谓语，优先考虑动词，结合语义并根据Late November and December能够推出应选择过去式动词，故答案锁定saw。 37、F。 decades 根据two，首选复数名词，结合语义，“ for the first time in the two decades”，二十年来头一次。 38、H。 globally 句子为主系表结构，不缺主要成分，所以首选副词和形容词，根据语义，ever表示“一直以来地、向来地”，“十一月向来是世界范围内最温暖的一个月。” 39、D。 chances 缺少主语，并且谓语是are，所以首选复数形式的名词，结合前文Enjoy the snow now，“享受现在的雪吧”，因为“时机是好的”。 40、J。 occurs 空格前方有主语，且是单数形式，而后面由when引导的时间状语从句的时态是一般现在时，所以主句谓语锁定第三人称单数形式的动词，只能选择occurs。 41、A。 specific空格左为定冠词the，空格右为名词，中间只能选形容词，选择“特定的”符合语义。 42、B。 associated 空格左为be动词，右边为介词with，中间只能是形容词或动词的过去分词形式，be associated with表示“与…有联系”，符合原意。

43、G。 experiences 空格左为主语southern Africa，空格内应该为动词的第三人称单词形式，结合语义，选G，“南非经历着干燥的天气。 44、M。 reduce 空格左为情态动词，空格内必须为动词原形，填reduce“减少”符合原题。 45、K。 populations 空格与左边的large fish 共同构成动词support的宾语，只能选一个名词来作为名词词组，故选K，“大量的鱼群”。 【参考答案及解析】 61题，定位到第一段最后一句“varies by culture”，所以答案选A——They are culture-related。 62题，由题干的大写名词Russian定位到第二段和第三段。第二段的“Russian， for example， began to wake up about a half-hour later each day”这个句是干扰句，起得晚不一定睡得早，所以答案推不出“他们比其他地方的人睡得更久”。然后看到第三段“Russia’s other late nights and early mornings generally coincided with public holidays”，所以答案为C——They don’t sleep much on holidays。 63题，题干问的是欧洲人缺乏睡眠的major cause主要原因是什么，由题干的大写名词Europeans’ loss定位到倒数第二段的“compared to Germans， Italians， and the French， who stayed up around an hour and a half later on various days throughout the summer to watch the Cup”，原文的Germans，Italians， and the French就是题干中“Europeans”的同义改写，而他们stayed up就是为了to watch the Cup，所以说他们缺乏睡眠的原因便是C选项——The World Cup。

2015年12月大学英语四级真题及解析

2015年12月英语四级(CET4)真题试卷 Part I Writing ( 30 minutes) For this part, you are allowed 30 minutes to write an essay commenting on the saying ?Learning is a daily experience and lifetime mission.?You can cite examples to illustrate the importance of lifelong learning. You should write at least 120 words but no more than180words. Part II Listening Comprehension ( 30 minutes) Section A Directions: In this section, you will hear 8 short conver sat ions and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer. Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre. A) They admire the courage of space explorers. B) They enjoyed the movie on space exploration. C) They were going to watch a wonderful movie. D) They like doing scientific exploration very much. 2. A) At a gift shop. B) At a graduation ceremony. C) In the office of a travel agency. D) In a school library. 3. A) He used to work in the art gallery. B) He does not have a good memory. C) He declined a job offer form the art gallery. D) He is not interested in any part-time jobs. 4.A) Susan has been invited to give a lecture tomorrow. B) He will go to the birthday party after the lecture.

2015年12月英语四级考试真题及答案详解

2015年12月大学英语四级考试真题(第3套) Part Ⅰ Writing ( 30 minutes) Directions: For this part, you are allowed 30 minutes to write an essay commenting on the saying"Never go out there to see what happens, go out there to make things happen." You can citexamples to illustrate the importance of being participants rather than mere onlookers inlife.You should write at least 120 words but no more than 180 words. Part Ⅱ Listening Comprehension ( 30 minutes) 听力音频地址： https://www.sodocs.net/doc/bc8857553.html,/attached/media/20160426/20160426161254_0664.mp3 Sheet 1 with a single line through the centre. 1 A. Children should be taught to be more careful. B. Children shouldn't drink so much orange juice. C. There is no need for the man to make such a fuss. D. Timmy should learn to do things in the right way. 2. A. Fitness training. B. The new job offer. C. Computer programming. D. Directorship of the club. 3. A. He needs to buy a new sweater. B. He has got to save on fuel bills. C. The fuel price has skyrocketed. D. The heating system doesn't work. 4. A. Committing theft. B. Taking pictures. C. Window shopping. D. Posing for the camera. 5. A. She is taking some medicine. B. She has not seen a doctor yet. C. She does not trust the man's advice. D. She has almost recovered from the cough. 6. A. Pamela's report is not finished as scheduled. B. Pamela has a habit of doing things in a hurry. C. Pamela is not good at writing research papers. D. Pamela's mistakes could have been avoided. 7. A. In the left-luggage office. B. At the hotel reception. C. In a hotel room. D. At an airport. 8. A. She was an excellent student at college. B. She works in the entertainment business. C. She is fond of telling stories in her speech. D. She is good at conveying her message.

2015年12月四级真题第1套

2015年12月大学英语四级考试真题（第一套） Part I Writing(30minutes) Directions:For this part,you are allowed30minutes to write an essay commenting on the saying“Listening is more important than talking.”You can cite examples to illustrate the importance of paying attention to others’ opinions.You should write at least120words,but no more than180 words. Part II Listening Comprehension(25minutes) Section A Direction: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. Questions1and2will be based on the following news item. 1.A)Dismissing employees without giving advance notice. B)Checking employees’online private messages at work. C)Monitoring employees’performance on weekends. D)Closing employees’social media during work hours. 2.A)He did well in handling his clients’queries. B)He created a private account for his fiancée. C)He won the case against his employer recently. D)He was fired because of breaking company rules. Questions3and4will be based on the following news item. 3.A)It is widely used in Kenya. B)It has been increasing in value. C)It makes poor people’s life easier. D)It lowers the buying power of the rich. 4.A)It is a non-profit group located in Nairobi,Kenya. B)It works hard on replacing the national currency system. C)It introduced a community currency to a village in Kenya.

2015年12月英语四级考试真题及答案(第二套)

2015年12月大学英语四级考试真题(第2套) Part I Writing(30 minutes) Directions: For this part, you are allowed 30 minutes to write an essay commenting on the saying"Learning is a daily experience and a lifetime mission. " You can cite examples to illustrate the importance of lifelong learning. You should write at least 120 words but no more than 180 words. _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ Part II Listening Comprehension ( 30 minutes ) 听力音频地址： /media//173301_3840.mp3 Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will bea pause. During the pause, you must read the four choices marked A), B), C. and D), and decide which is the best answer.Then mark the corresponding letter on Answer Sheet I with a single line through the centre. 1. A. The agenda for the board of directors' meeting. B. The details of the meeting to be held next week. C. The reason for the man's absence from the meeting. D. The time for the man's visit to the woman's company. 2.A. At a travel agency. B. At a department store. C. In a library. D. In a post office. 3.A. He cannot hear the woman's call. B. He cannot get through to New York. C. He cannot recall the phone number. D. He cannot find a public phone nearby. 4.A. Watch a movie with the woman. B. Revise his thesis in the office. C. Do some shopping with Jane. D. Discuss his thesis with Prof. Hudson. 5. A. He just cannot work properly without a watch. B. He has no idea where he can buy a gold watch. C. He still does not know where he left his watch. D. He is not sure what went wrong with his watch. 6.A. He forgot all about what he said. B. He slipped and hurt his head. C. He was sorry for being off sick last week. D. He thought the woman's car had been sold.

2015年12月大学英语四级考试真题(2+答案)

2015年12月大学英语四级考试真题（第2套） Part I Writing（30 minutes） Directions: For this part，you are allowed 30 minutes to write an essay commenting on the saying "Learning is a daily experience and a lifetime mission.” You can cite examples to illustrate the importance of lifelong learning. You should write at least 120 words but no more than 180 words. Part II Listening Comprehension（30 minutes） Questions 9 to 11 are based on the conversation you have just heard. 9. A) From the wanted column. C) From a telephone directory. B) From some of her friends. D) From a television commercial. 10. A) She received full-time education abroad. C) She finished her secondary school. B) She graduated from an open university. D) She studied in a vocational college. 11. A) She is a shorthand-typist. C) She is a policewoman. B) She works as a tour guide. D) She teaches an evening class. Questions 12 to 15 are based on the conversation you have just heard. 12. A) It provides him with career opportunities. C) It has been off and on for ten years. B) It helps enlarge his customer network. D) It was interrupted for four years. 13. A) Individualized service. C) Home-made beer. B) Traditional setting. D) Social games. 14. A) The quality of beer. C) The owner's attitude. B) The atmosphere. D) The right location. 15. A) It is a rather tough job．C) It helps old people kill time. B) It is a profitable business. D) It makes retirees feel useful. Section B Directions:In this section，you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only. 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 Sheet 1 with a single line through the centre. Passage One Questions 16 to 18 are based on the passage you have just heard. 16. A) It is becoming increasingly popular. C) It gives rise to serious social instability. B) It helps the user to escape reality. D) It hurts a person and those around them. 17. A) They use drugs just for fun. C) They use drugs as medicine. B) They take drugs to get high. D) They keep drug use a secret. 18. A) It is quite common in entertainment circles. B) It is the cause of various social problems. C) It is hard to get rid of. D) It is fatal to the user. Passage Two Questions 19 to 22 are based on the passage you have just heard. 19. A) Taking up exercises after recovery. C) Finding new ways to cure heart disease. B) Producing tasty healthy frozen food. D) Going on a diet upon leaving the hospital. 20. A) It was carefully tested with consumers. C) It was disapproved by many diet experts. B) It was promoted by health organizations. D) It was highly expected by the general public. 21. A) Competitive price. C) Vigorous promotion. B) Low expectations. D) Unique ingredients. 22. A) It was suggested by the firm's vice-president.

2015年12月四级阅读真题第一套卷答案

2015年12月四级阅读真题第一套卷答案 新东方&新东方在线联合发布 Children do not think the way adults do. For most of the first year of life, if something is out of sight, it’s out of mind. If you cover a baby’s 36 toy with a piece of cloth, the baby thinks the toy has disappeared and stops looking for it. A 4-year-old may 37 that a sister has more fruit a juice when it is only the shape of the glasses that differ , not the 38 of juice. Yet children are smart in their own way. Like good little scientists, children are always testing their child-sized 39 about how things work. When your children throws her spoon on the floor for the sixth time as you try to feed her , and you say. “That’s enough! I will not pick up yo ur spoon again!” the child will 40 test your claim. Are you serous? Are you angry? What will happen if she throws the spoon again? She is not doing this to drive you 41 ; rather, she is learning that her desires and yours can differ, and that sometimes those 42 are important and sometimes they are not. How and why does children’s thinking change? In the 1920s. Swiss psychologist Jean Piaget proposed that children’s congnitive(认知的) abilities unfold 43, like the blooming of a flower, almost independent of what else is 44 in their lives. Although many of his specific conclusions