专业英语复习题
科技英语考试范围及其复习资料句子翻译有什么错误可以给我发消息，阅读理解做好了的，答案发给我哈。
复习题：
Translation.（翻译）
★sentence:(句子翻译考试20个从中选六个)
1.Data is a collection of un-oragnized facts which can include woeds numbers images and sounds. 数据收集的是无组织的事实，它可以包括文字，数字，图像和声音的。
2.A computer cinsists of a variety of hardware components that work together with softw are to （没来得及抄完呀，谁抄好了这条给我发扣扣）
3.There hardware components include input devices,output devices a system unit storage and communication devices.
有硬件部件包括输入设备，输出设备系统单元的存储和通信设备
4.An input device allows a user to enter and commands into the memory of a computer.
一种输入设备允许用户输入和命令向计算机存储。
5.Storage differs from memory,which can hold these items permanently whereas memory holds these memory holds items only temporanrily.
外存和内存不一样，它可以支持永久存储，然而内存只暂时存储数据。
6.A hard disk provides mush grester storage capacity than a floppy disk.
硬盘能提供比软盘更大的存储容量。
7.Four cornmon storage devices are floppy disk drive a hars disk dive a CD-ROW drive and a DVD-ROW drive.
四种常用的存储设备有软盘驱动器，CD-ROW驱动器，DVD驱动器。
8.The central processing unit(CPU),sometimes referred to as the processor.interprets and carries out(perform) the basic instrucitions that operate a computer
中央处理单元，有时候它也被称为处理器，解释和执行操作计算机的基本指令。
9.In the system unit,a computer’s memory stores data instructions and information.
在系统单元中，就是那几存储可以存储数据、指令、信息。
10.Rom(Read-only Memory)is a memory chip that only can be read and used;that is,it cannot be modified
R读存储是一种只能用来读，不能修改的存储芯片。
11. Four commonly used input devices are the keyboard the mouse .a mocrophone and pc camera. 四种常用的输入设备包括键盘、麦克风、PC相机和鼠标。
12.An optical scanner reads printed text and graphics and then translates the results into a form computer can use.
光学扫描仪读入印刷文本和图形，然后将其翻译成计算机能使用的形式
13.Reasolution ypically is measured in dots per inch,and is stated.as the number of columns and rows of dots
分辨率通常是由每英寸的像点数来衡量，并以行数与列数说明。
14.Output is datathat has been processed into useful from called information.that is a computer processes intput into output.
输出是被处理成有用信息形成的一种数据。计算机可以将输入处理或者输出。
15.To store such sounds, a computer converts the sounds from a continuous analong signal into a digital format.
为了存储声音，计算机将其模拟信号转换成数字格式。
16.An output device is any computer component capable of conveying (传送)information to a user.
一种输出设备是一种将有用的信息传送给用户的计算机控件。
17.Display devices include CRT monitors,flat-panel displays.
显示器包括CRT显示器、平板显示器。
18.Color monitors are used widely with all types of computers because most of today’s software is designed to display in for mation in color.
彩色显示器被广泛用于所有类型的计算机，因为今天的大多数软件是用来显示信息的颜色。
19.Each dot, called a pixel, is a single point in an electronic image
每个点称为像素点，是电子图像中单一的点。
20.This cycle of intput,process,output,and storage is called information processing cycle.
这个输入处理输出存储的循环被称为信息处理循环。
★Paragraph（段落翻译从五个中选一个）
1.
A high-level language is an artificial language with which we can write various instructions. This is possible not because computer processors are now so technologically advanced that they can ‘understand’ these languages. You should translate from programming languages into machine language which can be understood by the computer processors. Compilers can accomplish this task. This does mean that a
high-level language program is not directly executable: it must be compiled to produce processor program, which is executable.
2.
A stack organized in a contiguous block of memory cells exhibits little difference between the conceptual structure and the actual structure in main memory. Suppose, however, that we cannot reserve a fixed block of memory and be assured that the stack will always fit. A solution is to implement the stack as a linked structure similar to that of a
list. This avoids the limitations of restricting the stack to a fixed-size block, since it allows the entries in the stack to be stuffed into small pieces of available space anywhere in memory. In such a situation, the conceptual stack structure will be quite different from the actual arrangement of the data in memory.
3.
As we observed in the case of lists, a programmer would probably find it advantageous to write procedures that perform these push and pop operations so that the stack could be used as an abstract tool. Note that these procedures should handle such special cases as attempts to pop entries from an empty stack and to push entries onto a full stack. In particular, a complete stack system would probably contain procedures for pushing entries, popping entries, testing for an empty stack, and testing for a full stack.
4.
Once again, we should recognize the difference between the conceptual structure envisioned by the user of a queue and the actual cyclic structure implemented in the machine's memory. As in the case of the previous structures, these differences are normally bridged by software. That is along with the collection of memory cells used for data storage, a queue implementation should include a collection of procedures that insert and remove entries from the queue as well as detect whether the queue is empty or full.
我们应该再次认识到队列使用者使用的概念结构与实际在计算机存储器中实现的循环结构之间的差异。在前一个结构的例子中，这些差异通常是通过软件来衔接的。也就是说，连同存储数据需要的一组存储单元，队列的实现应该包括一组用来插入和移出队列条目和探测队列是否为空或满的过程函数。然后，开发软件其他单元的程序员可以通过这些方法来实现队列的插入和移出操作，而不用关心其在存储器中的实际实现。
5.
The goal is not to produce a working version of the product but to obtain a demonstration tool that can be used to clarify communication between the parties involved. For example, rapid prototypes have proved advantageous in ironing out system requirements during the analysis stage or as aids during sales presentations to potential clients.
我们的目标不是制作产品的有效版本，而是获得一个示范工具，以便阐明有关方面之间的沟通。例如，在分析阶段解决系统的需求问题，或在销售阶段作为向潜在客户演示的辅助, 快速原型具有很大的优势
Ⅱ. Comprehension(阅读理解)(阅读理解从四个中选二个)
Passage A
Anyone who producing a system uses a computer needs to consider how the computer should be programmed. We need to consider.
How easy will it be to design the program?
How easy will it be to produce and test the program?
How significant would a program failure be?
How will errors be corrected or to modifications made to the program during its lifetime?
A key factor effecting programming is the language we choose: choice of the wrong language could be as disastrous to the overall project as choice of the wrong computer.
Many of computer books focus on the production of good programs. First we must understand the concept of a good program. Good program can be written in any language: knowing a programming language well is not the same as programming well. It is very easy for a bad programmer to produce bad programs using a good high-level language.
The first characteristic we look for in a program is that it is error free.
This means that is should run without failure, producing consistent results. Note that this does not mean that no fault conditions are detected, for such action should be considered correct behavior.
Hand in hand with this, the program should be will defined. This means that the program does perform the actions requested in its specification and does not any undefined extension of that specification. A program that runs without error but does the wrong job is a bad program.
A good program must be easy to understand. One can never predict when a new programmer will have to take over a program. This could be due to illness, staff turnover or simply that a design modification demands changes to a piece of completed code. A good program must be clearly written so that it can be easily understood by new programmers or by the original programmer in revision.
A program, which is easy to be understood should be easy to amend. Most programs have to be amended in their lifetime, and careless amendments can generate many errors. It has been proved that large programs wear out, in the sense that repeated amendments reduce them to such a state that a total rewrite is necessary.
A good program should be easy to test. It should clearly define data and exception conditions. Input and output data should be designed so that test data may be inserted or extracted without any effort.
A good program will be easy to operate. The interaction between the user and the
program must be clear and straightforward, particularly in error situations.
A good program must be efficient. The level of efficiency will depend upon the application, but the program must work within any hardware limitation on storage and must respond in the time required.
A good program should be portable, i.e. it should be possible to move it from one machine environment to another without any effort.
1. What is the first characteristic we look for in a program?
A. The organization of the program
B. Error free
C. Well defined
D. Easy to understand
2. What is the characteristic of a good program should be has?
A. A good program should be easy to understand.
B. A good program should be easy to amend.
C. A good program should be easy to test.
D. A good program should be easy to operate.
E. A good program should be efficient.
F. A good program should be portable.
G. All of the above.
3. What is the meaning of “the program is easy to understand”?
A. This means the program is very simple.
B. This means the code of the program is very little.
C. This means the program is clearly written so that it can be easily understood by new programmers or by the original programmer in revision.
D. This means the program is difficult to amend.
4. What is the meaning of “A good program should be easy to test.” in the text?
A. It means a good program should be very simple to test.
B. It means a good program should be very little to test.
C. It means it should clearly define data and exception conditions. Input and output data should be designed so that test data may be inserted or extracted without undue effort.
D. It means the program is clearly written so that it can be easily understood by new programmers or by the original programmer in revision.
E. This means the program is difficult to amend.
5. Before we produce a program, we should consider( ).
A. How easy will it be to design the program?
B. How easy will it be produce and test the program?
C. How significant would a program failure be?
D. How will errors be corrected or to modifications made to the program during its lifetime?
E. All of the above.
Passage B
A computer virus is a computer program that is created to make and spread copies of itself. The program may however also be designed to have other effects on the systems it infects, ranging from the annoying to the disastrous.
Virus attacks are growing rapidly these days. According to BusinessWeek, the 76,404 attacks reported in the first half of 2003 nearly match previous year's total number . As new antivirus tools are more powerful than before, the virus writers are getting a lot smarter with newer and creative ways to attack network systems. Let's first examine some common virus types:
Basic Virus - a piece of software code that is developed to attack computers and network systems via email or Internet connections. It quickly replicates itself and gradually attaches to files, programs or the hard drive.
Trojan Horses - This is a program that doesn't replicate when entering a system but can be effectively used to open 'back doors.' Trojan Horses allow hackers to take control over a particular system or to steal very important data.
Worm - this type of virus is able to spread itself automatically over the network from one computer to the next. During a worm attack, users' computers get infected without even having to click open email attachment or any program, etc.
Since it is very difficult to avoid the virus, your best defense is a powerful antivirus program. In order to fight with such viruses, the software vendors should focus on making their products more robust. This may ask for a trade-off between user-friendliness and security. In specific cases it may require line-by-line inspection, code retooling and even systems automation to defend the installed programs.
1．A computer virus is a computer program that is created to make and spread of itself.
A．programs B．virus C．copies D．files 2．Worm spread itself except by .
A．network B．E-mail C．program D．hardware 3．Antivirus program can scan and virus.
A．clean B．produce C．replicate D．make
4．Trojan Horses .
A．quickly replicate itself and gradually attache to files, programs or the hard drive. B．infect the computer without even having to click open email attachment or any program.
C．allow hackers to take control over a particular system or to steal very important data.
D．avoid the virus to attack computer.
5．According to BusinessWeek, the attacks reported in the first half of 2003 nearly match previous year's total number .
A．86,404 B．76,404 C．56,354 D．34,876
Passage C
The central processing unit (CPU) is the heart of the computer systems. Among other things, its configuration determines whether a computer is fast or slow in relation to other computers. The CPU is the most complex computer system component, responsible for directing most of the computer system activities based on the instructions provided. As one computer generation has evolved to the next, the physical size of the CPU has often become smaller and smaller, while its speed and capacity have increased tremendously. Indeed, these changes have resulted in microcomputers that are small enough to fit on your desk or your lap.
The CPU comprises the control unit and the arithmetic / logic unit (ALU).
The control unit is responsible for directing and coordinating most of the computer systems activities. It determines the movement of electronic signals between main memory and the arithmetic/logic unit, as well as the control signals between the CPU and input/output devices.
The ALU performs all the arithmetic and logical (comparison) functions — that is, it adds, subtracts, multiplies, divides, and does comparisons. These comparisons, which are basically “less than”, “greater than”, and “equal to”, can be combined into several common expressions, such as “greater than or equal to”. The objective of most instructions that use comparisons is to determine which instruction should be executed next.
（二）Tell whether the following statements are true(T) or false(F) according to the passage A.（根据上文的内容判断下列句子的正误）（10分,每题2分）
1. With the development of computer, the physical size of the CPU has often become bigger and bigger. ( )
2. The movement of electronic signals between main memory and the ALU as well as the control signal between the CPU and input /output devices are controlled by the control unit of the CPU. ( )
3. The CPU comprises the control unit and memory. ( )
4. The control unit performs all the arithmetic and logical (comparison) functions
5. The central processing unit (CPU) is the heart of the computer systems. ( )
Passage D
In order to solve a computational problem, its solution must be specified in terms of a sequence of computational steps, each of which may be performed by a human or a digital computer . If you want to solve the computational problem with a computer, you should learn how to program. The task of developing programs for the solution of
computational problems is referred to as programming. Computer programming is the process of planning and creating a sequence of steps for a computer to follow. In general, this process will help us resolve a problem, which is either too tedious or difficult to work out otherwise . So programming is breaking a task down into small steps.
Programming is sometimes contrasted with coding. Coding generally refers to the writing of programs for given program specification, while programming includes the task of preparing the program specification as well as that of writing the program. The text of a program is sometimes referred to as code, and lines of program text are referred to as lines of code, especially in the case of machine-language programs. The term coder is used to describe a person engaged exclusively in implementing program specifications prepared by others.
What's actually involved in programming - the actual process of writing programs? Here's a quick overview of the process:
· Write a program.
· Compile the program.
· Run the program.
· Debug the program.
· Repeat the whole process until the program is finished.
1．If you want to solve the computational problem with a computer, you should learn how to .
A. calculate
B. program
C. add
D. subtract
2. Computer programming is the process of planning and creating a sequence of for a computer to follow.
A. steps
B. process
C. lines
D. graphics
3. The term coder is used to describe .
A. machine
B. computer
C. keyboard
D. person
4. In order to solve a computational problem, you can let a person or a to do it.
A. machine
B. computer
C. keyboard
D. mouse
5. Which of the following is not the stages of programming?
A. Write a program.
B. Debug the program.
C. Print the program.
D. Compile the program.
3．Antivirus program can scan and virus.
A．clean B．produce C．replicate D．make
4．Trojan Horses .
A．quickly replicate itself and gradually attache to files, programs or the hard drive. B．infect the computer without even having to click open email attachment or any program.
C．allow hackers to take control over a particular system or to steal very important data.
D．avoid the virus to attack computer.
5．According to BusinessWeek, the attacks reported in the first half of 2003 nearly match previous year's total number .
A．86,404 B．76,404 C．56,354 D．34,876
统计学专业英语翻译
汉译英 Population 总体，样本总体sample 样本，标本parameter 限制因素 median 中位数odd 奇数，单数even 偶数 range 极差variance 方差standard deviation 标准差Covariance 协方差empty event 空事件product event 积事件 conditional probability 条件概率Random variable 随机变量binominal distribution 二项式分布uniform distribution 均匀分布Poisson distribution 泊松分布residual 残差 central limit theorem 中心极限定律 英译汉 descriptive statistics 描述统计学mathematical statistics 数理统计学inductive statistics 归纳统计学Inferential statistics 推断统计学dimension 维，维数continuous variable 连续变量ordinal variable 有序变量nominal variable 名义变量dichotomous 两分的；二歧的discrete variable 离散变量categorical variable 分类变量location 定位，位置，场所dispersion 分散mean 均值unimodal单峰的 multimodal 多峰的chaotic 无秩序的grouped data 分组数据 frequency distribution频数分布cumulative frequency 累加频数tallying 计算 Uniformly distribution 均匀分布histogram 直方图frequency polygon 频率多边图rectangle 矩形Percentile 百分位数quartile 四分位数 interquartile range 四分位数间距simple event 简单事件Compound event 复合事件mutually exclusive 互斥的，互补相交的complementary event 对立事件Independent 独立的joint probability function 联合概率函数jacobian雅克比行列式 Law of large numbers大数定律point estimate 点估计estimate 估计值 statistic 统计量optimality 最优性Unbiased estimate 无偏估计量efficient estimate 有偏估计量unbiasedness无偏性efficience有效性Consistent estimate 一致估计量 asymptotic properties 渐近性质Confidence interval 置信区间interval estimation 区间估计 null hypothesis 原假设alternative hypothesis 备择假设significance level 显著性水平power function 幂函数testing procedures 检验方法test statistic 检验统计量 rejection region 拒绝区域acceptance region 接受区域critical region 临界区域 first-derivatives 一阶导数second-derivatives 二阶导数Likelihood ratio 似然比dependent variable因变量unexplanatory variable未解释变量independent variable自变量 Error term 误差项regression coefficients 回归系数Sum of squared residuals 残差平方和Marginal probability function 边际概率函数joint probability density function 联合概率密度函数Marginal probability density function边际概率密度函数stochastically independent 随机独立的 Mutually independently distribution 相互独立的分布independently and identically distribution 独立同分布的likelihood function 似然函数maximum likelihood estimator 最大似然估计量 maximum likelihood estimate 最大似然估计值log-likelihood function 对数似然函数 ordinary least squares estimation/estimate/estimator 普通最小二乘估计/估计值/估计量 linear unbiased estimator 线性无偏估计
会计专业英语期末试题 )
期期末测试题 Ⅰ、Translate The Following Terms Into Chinese 、 1、entity concept 主题概念 2、depreciation折旧 3、double entry system 4、inventories 5、stable monetary unit 6、opening balance 7、current asset 8、financial report 9、prepaid expense 10、internal control 11、cash flow statement 12、cash basis 13、tangible fixed asset 14、managerial accounting 15、current liability 16、internal control 17、sales return and allowance 18、financial position 19、balance sheet 20、direct write-off method Ⅱ、Translate The Following Sentences Into Chinese 、 1、Accounting is often described as an information system、It is the system that measures business activities, processes into reports and communicates these findings to decision makers、 2、The primary users of financial information are investors and creditors、Secondary users include the public, government regulatory agencies, employees, customers, suppliers, industry groups, labor unions, other companies, and academic researchers、 3、There are two sources of assets、One is liabilities and the other is owner’s equity、Liabilities are obligations of an entity arising from past transactions or events, the settlement of which may result in the transfer or use of assets or services in the future、 资产有两个来源，一个就是负债，另一个就是所有者权益。负债就是由过去得交易或事件产生得实体得义务，其结算可能导致未来资产或服务得转让或使用。 4、Accounting elements are basic classification of accounting practices、They are essential units to present the financial position and operating result of an entity、In China, we have six groups of accounting elements、They are assets, liabilities, owner’s equity, revenue, expense and profit (income)、会计要素就是会计实践得基础分类。它们就是保护财务状况与实体经营
电子信息与通信工程专业英语期末必考公式大全
二、公式 (1) a -b =(a+b)(a-b) a squared minus b squared equals open parenthesis a plus b close parenthesis times open parenthesis a minus b close parenthesis. (2) X plus one over the quantity x squared times the quantity x cubed minus four to the two-third power. (3) The limit as n approaches infinity of the quantity one over n squared times one plus two plus to plus n. (4) One half open brace, a open bracket b plus open parenthesis c minus d close parenthesis close bracket close brace. (5) Capital sigma the quantity a sub n times b sub n times the cosine of n time omega over 2 times pi from n equals one to n equals five. (6) Product of all a from n equals one to Infinity. (7) max(a ,a ,^,a ) ,min(a ,a ,^,a ) Maximum/minimum value of the series a su b one to a sub n. (8) Limit as n approaches infinity of the quantity of one plus one over n to the nth power equals e. (9) , Upper/lower limit of a sub n as n approaches/tends to infinity. (10) y'=-1/x y prime equals minus one over x to the nth power. The first derivative of y with respect to x equals minus one over x to nth power. (11) The second derivative of y with respect to x equals a squared times e to the power of minus a times x. (12) The indefinite integral of the quantity a over x minus a with respect to x equals a times the quantity logarithm of the absolute value of x minus a plus c. (13) The integral from 0 to pi over two of the quantity one over one plus a times cosine of x with respect to x. (14)(a>0,m,n 均为正整 数) a to the minus m over n power equals one over the nth root of a to the mth power, where a is greater than zero, and both m and n are positive numbers. (15) f(x)=1+ln (x-2) The function of x equals one plus log the quantity x minus 2 to the base e. (16) sin3x ≡3sinx-4sin x The sine of three x is equivalent to three times sine of x minus four times the quantity sine x cubed. （ 17 ） Y(n)= ∑+∞ -∞ =-k k n h h x ) ()(=x(n)*h(n) Y open parenthesis n close parenthesis equals capital sigma the quantity x open parenthesis k close parenthesis h open parenthesis n minus k close parenthesis from k approaches negative infinity to k approaches positive infinity,equals x open parenthesis n close parenthesis convolution sum h open parenthesis n close parenthesis. （18） ?????= ?v dv d A S A S The close surface integral of A over a surface S is equal to the volume integral of the divergence of A over the volume V enclosed by S. （19） 1. The electric charges are the divergence sources of the electric fields. 2. The magnetics fields are solenoidal fields. 3. Time varying magnetic field produces an electric field. 4. The condition current and the displacement current are the curl sources of the magnetic fields. 2 2 3 232) 4(1 -+x x x )^21(12 lim n n n +++∞→｝ ｛)]([2 1d c b a -+)2cos(5 1 pi nw b a n n n ∑=∏ ∞ =1 n n a n 1 2 n 1 2 n e n n n =??? ? ?+∞→11lim n n squa ∞ →lim n n a inf lim ∞ →n ax e a dx y -=222d c a x a dx a x +-=-?||log a ? +2 /pi 0cos 1x a dx n m n m a 1a /=-3
最新统计学专业英语词汇完整版
统计学专业英语词汇 A Absolute deviation,绝对离差 Absolute number,绝对数 Absolute residuals,绝对残差 Acceleration array,加速度立体阵 Acceleration in an arbitrary direction,任意方向上的加速度Acceleration normal,法向加速度 Acceleration space dimension,加速度空间的维数Acceleration tangential,切向加速度 Acceleration vector,加速度向量 Acceptable hypothesis,可接受假设 Accumulation,累积 Accuracy,准确度 Actual frequency,实际频数 Adaptive estimator,自适应估计量 Addition,相加 Addition theorem,加法定理 Additivity,可加性 Adjusted rate,调整率 Adjusted value,校正值 Admissible error,容许误差 Aggregation,聚集性 Alternative hypothesis,备择假设 Among groups,组间 Amounts,总量 Analysis of correlation,相关分析 Analysis of covariance,协方差分析 Analysis of regression,回归分析 Analysis of time series,时间序列分析 Analysis of variance,方差分析 Angular transformation,角转换 ANOVA（analysis of variance）,方差分析 ANOVA Models,方差分析模型 Arcing,弧/弧旋 Arcsine transformation,反正弦变换 Area under the curve,曲线面积 AREG,评估从一个时间点到下一个时间点回归相关时的误差ARIMA,季节和非季节性单变量模型的极大似然估计Arithmetic grid paper,算术格纸 Arithmetic mean,算术平均数 Arrhenius relation,艾恩尼斯关系Assessing fit,拟合的评估 Associative laws,结合律 Asymmetric distribution,非对称分布 Asymptotic bias,渐近偏倚 Asymptotic efficiency,渐近效率 Asymptotic variance,渐近方差 Attributable risk,归因危险度 Attribute data,属性资料 Attribution,属性 Autocorrelation,自相关 Autocorrelation of residuals,残差的自相关 Average,平均数 Average confidence interval length,平均置信区间长度Average growth rate,平均增长率 B Bar chart,条形图 Bar graph,条形图 Base period,基期 Bayes theorem, 贝叶斯定理 Bell-shaped curve,钟形曲线 Bernoulli distribution,伯努力分布 Best-trim estimator,最好切尾估计量 Bias,偏性 Binary logistic regression,二元逻辑斯蒂回归 Binomial distribution,二项分布 Bisquare,双平方 Bivariate Correlate,二变量相关 Bivariate normal distribution,双变量正态分布 Bivariate normal population,双变量正态总体 Biweight interval,双权区间 Biweight M-estimator,双权M估计量 Block,区组/配伍组 BMDP(Biomedical computer programs),BMDP统计软件包Box plots,箱线图/箱尾图 Break down bound,崩溃界/崩溃点 C Canonical correlation,典型相关 Caption,纵标目 Case-control study,病例对照研究 Categorical variable,分类变量 Catenary,悬链线 Cauchy distribution,柯西分布 Cause-and-effect relationship,因果关系 Cell,单元 精品文档
英语专业知识
英语各类考试 三一口语（GESE）的全称为：英国伦敦三一学院英语口语等级考试（GESE-Graded Examinations in Speakers of Other Languages），它是经英国文化委员会提议，专门为非英语国家设计的纯英语口语等级考试体系。该考试共有12个级别，分成4个档次，每个档次有三个级别，其中1-6级是非常适合孩子的，这是现有英语考试中不多的适合孩子考试之一；7级以上不太适合孩子，但也可以考。 等级考试描述 英国伦敦三一学院英语口语等级考试（GESE-Graded Examinations in Speakers of Other Languages）是经英国文化委员会提议，专门为非英语国家设计的英语口语等级考试体系。目前已在世界四十多个国家和地区开展这项考试。1995年，北京高等学校教育科技发展中心开始与伦敦三一学院在教师培训和口语考试方面进行合作并取得了较好的效果。1999年，北京教育考试院与伦敦三一学院正式签署合作协议，引进该项考试。 等级考试的权威性 伦敦三一学院（TCL-Trinity College London）是经英国政府批准、为英国文化委员会承认的考试机构。伦敦三一学院在世界各地举办音乐、戏剧、英语口语等多类考试，是英国英语口语考试和授予英语教师资格证书的主要机构之一，也是英语考试服务系统的主要国际承办者之一。1995年，伦敦三一学院因其英语教育方面的成就获得英国女王嘉奖。伦敦三一口语证书是目前最火爆的口语水平测试证书，它以其权威性、实用性、系统性成为重点中学所青睐的英语口语能力证明之一。三一口语考试共分为12个级别，每三个级别为一个阶段，三一口语考试每月底进行，一个半两个月后出成绩。 内容 三一口语测试适于6-7岁以上母语为非英语的英语学习者。此项测试共分为四段12个级别。1-3级为预备段；4-6级为初级段；7-9级为中级段；10-12级为高级段。高级别的考试涵盖低于该级别的其他级别的内容。考试形式为考生与考官进行一对一的交谈。考试成绩评定：A—优秀，B—良好，C —及格，D—不及格 优势 大家为什么要考“三一口语”这一问题，首先，从发展方面来看，三一口语存在着很多的优势： 1.三一口语是国内第一个不与笔试捆绑的专项、系统的英语口语考试。 2.所有级别的考试都实行一对一的交流形式，与人机对话的考试方式相比更显人性化。 3.每个月中下旬组织一次考试，较之公共英语（每年仅三月和九月两次）机会较多。 4.三一口语考试无职业、学历、地域、年龄等限制，任何母语非英语的人员均可参加。 5.三一口语为水平考试，考试通过率高，证书颁发得快。对急于获得证书的家长是一个不错的选择。然后，再从学习成长方面来看，三一口语可能是所有认证考试中最适合学生学习的课程。三一口语的多层次、多类别、幽默风趣的学习方式更能够调动中小学生学习英语的兴趣和积极性。三一口语更侧语言沟通的交流与表达，使得学生能在学习的过程中快速的提高自己的英语表达水平，非常有利于孩子以后的成长和发展。最后，从学习的困难
最新信息与通信工程专业英语(第2版) 韩定定 李明明
第一课现代数字设计及数字信号处理 课文 A: 数字信号处理简介 1.什么是数字信号处理？ 数字信号处理，或DSP，如其名称所示，是采用数字方式对信号进行处理。在这种情况下一个信号可以代表各种不同的东西。从历史的角度来讲，信号处理起源于电子工程，信号在这里意味着在电缆或电话线或者也有可能是在无线电波中传输的电子信号。然而，更通用地说，一个信号是一个可代表任何东西--从股票价格到来自于远程传感卫星的数据的信息流。术语“digital”来源于“digit”，意思是数字（代可以用你的手指计数），因此“digital”的字面意思是“数字的，用数字表示的”，其法语是“numerique”。一个数字信号由一串数字流组成，通常（但并非一定）是二进制形式。对数字信号的处理通过数字运算来完成。 数字信号处理是一个非常有用的技术，将会形成21世纪的新的科学技术。数字信号处理已在通信、医学图像、雷达和声纳、高保真音乐产生、石油开采等很广泛的领域内引起了革命性的变革。这些领域中的每一个都使得DSP技术得到深入发展，有该领域自己的算法、数学基础，以及特殊的技术。DSP发展的广度和深度的结合使得任何个人都不可能掌握已发展出的所有的DSP技术。DSP教育包括两个任务：学习应用数字信号处理的通用原则及学习你所感兴趣的特定领域的数字信号处理技术。 2.模拟和数字信号 在很多情况下，所感兴趣的信号的初始形式是模拟电压或电流，例如由麦克风或其它转换器产生的信号。在有些情况下，例如从一个CD播放机的可读系统中输出的信号，信号本身就是数字的。在应用DSP技术之前，一个模拟信号必须转换成数字信号。例如，一个模拟电压信号，可被一个称为模数转换器或ADC的电路变换成数字信号。该转换器产生一系列二进制数字作为数字输出，其值代表每个采样时刻的输入模数转换设备的电压值。 3.信号处理 通常信号需要以各种方式处理。例如，来自于传感器的信号可能被一些没用的电子“噪声”污染。测心电图时放在病人胸部的电极能测量到当心脏及其它肌肉活动时微小的电压变化。信号也常会被来自于电源的电磁干扰所影响。采用滤波电路处理信号至少可以去掉不需要的信号部分。如今，对信号滤波以增加信号的质量或抽取重要信息的任务越来越多地由DSP技术完成而不是采用模拟电路完成。 4.DSP的发展和应用 数字信号处理的发展起源于60年代大型数字计算机进行数字处理的应用，如使用快速傅立叶变换（FFT）可以快速计算信号的频谱。这些技术在当时并没有被广泛应用，因为通常只有在大学或者其它的科研机构才有合适的计算机。 由于当时计算机很贵，DSP仅仅局限于少量的非常重要的应用。先驱们的探索工作主要集中在4个关键领域：雷达和声纳，用于保卫国家安全；石油开采，可以赚大量的钱；空间探索，其中的数据是不能重复产生的；及医学图像，可以救治生命。 20世纪80年代到90年代个人电脑的普及使得DSP产生了很多新的应用。与以往由军方或政府的需求驱动不同，DSP突然间由商业市场的需求驱动了。任何认为自己能在这个飞速发展的领域赚钱的人都会立即成为DSP供应商。DSP通过在移动电话、CD播放器及语音邮件等产品中应用进入了公共应用领域。 这些技术革命是自上而下发生的。在20世纪80年代早期，DSP是电子工程专业的研究
统计英文词汇
A abscissa横坐标 absence rate缺勤率 absolute number绝对数 absolute value绝对值 accident error偶然误差 accumulated frequency累积频数 alternative hypothesis备择假设 analysis of data分析资料 analysis of variance(ANOVA)方差分析 arith-log paper算术对数纸 arithmetic mean算术均数 assumed mean假定均数 arithmetic weighted mean加权算术均数asymmetry coefficient偏度系数 average平均数 average deviation平均差 B bar chart直条图、条图 bias偏性 binomial distribution二项分布 biometrics生物统计学 bivariate normal population双变量正态总体 C cartogram统计图 case fatality rate(or case mortality)病死率 census普查 chi-sguare(X2) test卡方检验 central tendency集中趋势 class interval组距 classification分组、分类 cluster sampling整群抽样 coefficient of correlation相关系数 coefficient of regression回归系数 coefficient of variability(or coefficieut of variation)变异系数 collection of data收集资料 column列（栏） combinative table组合表 combined standard deviation合并标准差 combined variance(or poolled variance)合并方差complete survey全面调查
专业英语期末试卷
ACCOUNTING ENGLISH Middle-of-term Test Papers PartⅠ.Translating the following terms 1、Notes to financial statements 2、Accounting elements 3、Variable costs 4、Economic entity 5、Depreciation expense 6、Deferred income taxes 7、Nominal accounts 8、ROA 9、LIFO 10、Work in process 11、现金收支 12、原材料 13、制造费用 14、相关性 15、持续经营 16、复式记账 17、优先股 18、预付费用 19、购货退回与折让 20、永续盘存制
PartⅡ.True or False 1、 The accounting process generates financial reports for both “internal ”and “external”users. 2、The balance sheet reflects the basic accounting equation and the means of financing the organization's assets. 3、The existence of Accounts Receivable on the Balance Sheet indicates that the company has one or more creditors. 4、Liabilities are classified and presented in increasing order of liquidity. 5、Working capital equals current assets less current liabilities. 6、Declaration of dividends reduces the retained earnings portion of the owners' equity of the corporation and creates a liabilities called Dividends Payable. 7、A chart of accounts is a listing of the titles of all accounts. 8、The cash basis of accounting often violates the matching rule. 9、Closing entries convert real and nominal accounts to zero balance. 10、The work sheet is published with the balance sheet and income statement, as a supplementary statement. 11、A company's sustainable growth rate is the highest growth rate in sales it can attain without issuing new stock. 12、Only rapidly growing firms have growth management problems.
汽车工程专业英语》期末试卷
一、选择题 1、The four-stroke cycle operates in which order __C__. A. intake, exhaust, power, compression B. intake, power, compression, exhaust C. intake, compression, power, exhaust 2、With the piston at the bottom of the cylinder, the ___C____ valve ___________ to allow the burned exhaust gas to be expelled to the exhaust system. A.intake, closes B. exhaust, closes C. exhaust, opens 3、A car engine's job is to ___B__ A. Convert fuel into heat B. Convert fuel into motion C. Convert fuel into exhaust 4、When the crankshaft completes four revolutions for a four-cycle engine, each cylinder will have gone through ____B____intake stroke(s). A.one B. two C. Three 5、___C___ is the life-blood of the engine. A. gas B. water C. Oil 6、What is the core of a car's engine___C___ A.The spark plug B. exhaust C. The cylinder 7、What determines the size and the placement of the engine block____C____ A. The number of spark plugs B. The number of pistons C. The number of cylinders 8、In the standard engine, each cylinder has ___A___. A.four valves B. two valves C. one valve 9、A crankshaft's job in an engine is to ___C___ A. Deliver fuel to the cylinders B. Keep cylinder heads in place C. Change linear motion into rotational motion 10、The _____C___ system on an internal combustion engine provides the spark that ignites the combustible air/fuel mixture in the combustion chamber. A.starting B. fuel C. igniting 二、填空题 1.Today’s average car contains more than 15000 separate, individual parts that must work together. These parts can be grouped into four major categories: body，engine，chassis and electrical system . 2.The direction motion of vehicle is controlled by a steering system. A basic steering system has 3 main parts: steering control mechanism ，steering gear and steering linkage mechanism which connecting wheels and steering gear . 3.The location of the driving axle determines whether the vehicle is classified as rear-wheel?drive ，front-wheel?drive ，four-wheel?drive and all-wheel drive. 4.The modern clutch9 is a single plate, dry disc . It consists of five major parts: flywheel, clutch disc , pressure plate assembly, throw-out bearing , and clutch linkage.
专业英语词根知识讲解
专业英语词根
词根与词缀 1.narc（o）麻醉，睡眠 narcosis 麻醉 narcolepsy 嗜眠症 2.somn（o）；somn（i）；hypn（o）睡 somnolent 瞌睡的，嗜眠的 hypnosia嗜眠 troph（o）营养 trophocyte 滋养细胞https://www.360docs.net/doc/9315053322.html,ct（o）乳，乳酸 lactobacilli 乳（酸）杆菌 lactose 乳糖 4.albumin（o）蛋白（质） albuminuria 蛋白尿 protein 蛋白质，蛋白 proteinemia 蛋白血症5.gluc（o） glyc（o）葡萄糖 glucopenia 低血糖 glycogen 糖原
6.adip（o）脂 adiposis 肥胖症 adipoma 脂瘤 7.steat（o）脂，脂肪 steatoma 脂瘤 steatosis 脂肪变性 8.lip（o）脂，脂肪 lipidosis 脂沉积症 lipoma 脂肪瘤 9.orth（o）直立，正常，正 orthodontics 正牙学，正畸学 orthogenics 优生学 10.path（o）病，疾病 pathoanatomy 病理解剖学 pathology 病理学 11.gloss(o) ; lingu(o) ;stomat(o) 舌；口；口腔 stomatitis 口炎 stomatology 口腔学 12.sial（o）涎，唾液
sialosis 流涎；多綖 sialoangiitis 涎管炎 13.or（o）口 oropharynx 口咽（部） oronasal 口鼻的 14.hydr（o）水；氢 hydrothorax 胸膜腔积水 hydroa 水疱 15.dips（o）口渴 dipsosis 烦渴 dipsia 口渴 16. syn- ，sym合，同 Conception 妊娠，概念 Synchronia 同时性，同步性 Symbiology 共生学 17.gnos(o) 感知 gnosia 认识;感知 gnosis 感悟 18.onc（o）瘤，肿
电子信息与通信工程专业外语期末考试重点
大规模集成电路 可编程逻辑控制器 发光二极管 集成电路 交流 直流 数字信号处理 数字信号处理器 近距离无线通信 个人通信服务 掌上电脑（个人数字助理） 分组数据蜂窝 服务质量 无线电传输技术 超宽带 二、翻译公式 基本函数公式 英语-公式 1. a 22=()() a b a b a b . 2. 3 232)4(x 1 x -+x x x x . 3. ).......21(1 lim 2n n n +++∞→ n n n. 4. {a[()]} , a b c d . 5. ) 2cos(a 5 1πω n b n n n n ∑== a n b n n 2 n n . 6. ∏∞ =1 n n a n . 7. (a 12,……) (a 12,……) a a n. 8. e n n n =+∞→)11(lim n n e. 9. n n squa ∞→lim n n a inf lim ∞→ a n n . 10. y’1 y x . y x x .
11. ax e a dx y -=222d y x a e a x. 12. c a x a dx a x +-=-?||log a a x a x a x a c. 13. dx ?+20acosx 11 π 0 a x x. 14. n m n m a 1 a =- (a>0均为正整数) a m n a , a , m n . 15. )2ln(1)(-+=x x f x x 2 e. 16. x x x 3sin 4sin 33sin -≡ x x x . 公式-英语 3-22 ∑∞ =-∞ =-=n jwn e n h H n )(）（ω H ω h n e j ω n n n . 3-23 ωωπωπ πd e H n h n j ?-=)(21)( -∞≦n ≦∞ h n H w e j w n w, n n 3-24 ωωωππ d n h n h )cos()(1 )(0?=m 0≥n h n H ω ω n ω n . 3-25 h()(n) n ≧0 h n h n 3-26 otherwise M n M n n h 0)(h {)(≤≤-=‘ H n h n n M n h n 3-27 ∑=-=-=M n M n z n h z H n )(）（‘ H Z h n z n M M. 4-1 →→ →→→???+=???s d t D J l d H s )(c C J D 4-2 4-3 →→ →→???=???s d t B l d H s )(-c C H B
统计学专业英语词汇完整版
统计学专业英语词汇 1 统计学专业英语词汇 A Absolutedeviation, 绝对离差 Absolutenumber, 绝对数 Absoluteresiduals, 绝对残差 Accelerationarray, 加速度立体阵 Accelerationinanarbitrarydirection,任意方向 上的加速度Accelerationnormal,法向加速度 Accelerationspacedimensi on, 加速度空间的维数 Accelerationtange ntial, 切向加速度 Accelerationve ctor,加速度向 量 Acceptablehypothe sis, 可接受假设Accumulation,累积 Accuracy,准确 度 Actualfreque ncy,实际频数Adaptiveestima tor, 自适应估计量Addition,相 加 Additiontheore m, 加法定 理 Additivity, 可加性Adjustedrate,调整率 Adjustedvalu e, 校正值 Admissibleer ror, 容许误差Aggregation,聚集 性 Alternativehypoth esis, 备择假设Amonggroups,组间 Amounts,总量 Analysisofcorrela tion, 相关分析Analysisofcovaria nce, 协方差分析Analysisofregress ion, 回归分析Analysisoftimeser ies, 时间序列分析Analysisofvariance,方差 分析 Angulartransforma tion, 角转换 ANOVA （analysisofvariance ）,方差分析ANOVAModels, 方差分析模 型 Arcing,弧/弧 旋 Arcsinetransforma tion, 反正弦变换Areaunderthecurve , 曲线面 积 AREG,评估从一个时间点到下一个时间点回归相关时的误差 ARIMA,季节和非季节性单变量模型的极大似然估计Arithmeticgridpaper, 算术格纸Arithmeticmean, 算术平均数 Arrheniusrelation, 艾恩尼斯关系Assessingfit,拟合的评估 Associativelaws, 结合律