计算机专业英语例题20(1995年第12题)

计算机专业英语

例题20（1995年第12题）

Although parallel server hardware has been available for some time, commercially available parallel versions of database (A) are just now arriving from (B) database makers to take advantage of the hardware’s speed.

Parallel hardware and database (C) are probably overkill for some applications, such as small departmental systems, analysts say. But user at large sites now installing parallel systems say they can (D) improve database response (E) for large decision-support, order-entry, and data warehouse applications.

供选择的答案

A. hardware software ●firmware ?netware

B. leading lead ●leader ?leadering

C. combination collection ●combinations ?collections

D. differently drastically ●important ?good

E. action condition ●space ?time

词汇及短语

Parallel: 并行的；commercially: 商务的；overkill: 扼杀；

Analyst: 分析师；decision-support: 决策支持；

data warehouse: 数据仓库。

例题分析

Software: 软件。和前面的hardware（硬件）照应。

Leading：主要的，居领导地位的。现在分词表状态。

Combinations: 联合（一般现在时），因为主语是指代“硬件和数据库的”整个联合体，作为一个事物看待，因此谓语动词用单数第三人称。

Drastically: 激烈地，彻底地；这里用副词修饰动词，明显differently与语言环境不合，而Important和good都是形容词。

Response time: 响应时间，这是描述数据库性能的专用技术名词。

参考译文

尽管并行服务器硬件已经面世一段时间了，可是能与这种硬件速度匹配的，可用的商用并行数据库才刚由主要的数据库供应商推出。据分析家所言，并行硬件和数据库的结合很可能会威胁到小部门管理系统等应用软件的生存。但是那些已经安装了并行系统的大客户称，他们可以极大地提高大型决策支持系统、订单系统以及数据仓库应用程序对数据库的响应时间。

例题答案：A. B. C. ● D. E. ?

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习题+答案 2.1 Write T or F to each stateme nt T6. An asynchronous device is a clocked device. T7. A latch is an asynchronous device, because it functions at arbitrary times. T8. The repetiti on of clock pulse can vary from very low rate to very high rate. T9. A synchronous device changes its state only on the arrival of a clock pulse. F10. A clock in put may occur at any time. T11. The clock pulses are used to synchronize all operations of the shift register. T13. A uni direct ional shift register is capable of shift ing in one direct ion only. F14. I n a shift-left register the serial in put determ ines what goes into the leftmost position during the shift register. F15. To provide parallel tran sfer capability some additi onal in put and output lines should be provided to the shift register. Choose the best an swer for each of the follow ing 1. How can the output of a logic gate be en ergized? C A By cha nging its in puts. B By rema ining its in puts un cha nged. C By meet ing the specific in put con diti on. D By givi ng a pulse. 3. A NAND gate con sists of D . A an OR gate followed by an in verter B an AND gate followed by an in verter C an AN D gate followed by an OR gate D an in verter followed by an AND gate 4. Un der what con diti on is the output of a two-i nput XOR gate logic-high? B A Its in puts are simulta neously at the same logic level. B Its in puts are simulta neously at opposite logic levels. C Its in puts are logic-low. D its in puts are simulta neously logic-high. 2.2 Write T or F for each stateme nt T 1. The CPU uses the in put and output un its to com muni cate with the outside world. F2. Main memory is sometimes called exter nal memory. F3. After execution the program and the related files of data and files of information will be retained in the main memory for later use. F4. Personal computers have not the features of the larger system.. T5. Large systems offer higher process ing speeds for user and retur n more data tha n PCs.

计算机专业英语复习题

一、判断对错 1. The software system is the physical equipment that you can see and touch. 2. Typically, a data value is set to zero to represent FALSE and 1 value for TRUE. 3. In the earliest general-purpose computer, most input and output media were magnetic disks. 4. Supercomputers are largest, fastest, and most expensive computer available. 5. A computer system consists of hardware system and software system. 1. The data bus always receives data from the CPU, and the CPU never reads the data bus. 2. Main memory holds whatever programs and data are available for immediate use by the CPU. 3. Dynamic RAM does not have to be refreshed. 4.Dot-matrix printer work by squirting tiny droplets of liquid ink at the paper. 5. The auxiliary memory is very small, relatively expensive, and has very high access speed. 1. Shift registers operate in serial fashion all the bits of the word at a time. 2. RISC processors have larger instruction sets that often include some particularly complex instructions. 3. SIMD represents an organization that includes many processing units under the supervision of a common control unit. 4. Parallel processing is established by distributing the data among the multiple functional units. 5. RISC is a complex instruction set computer. 1. A number of different algorithms can exist for solving a computational problem, and each of these algorithms could have a same running time complexity. 2. The divide-and-conquer algorithm is a bottom-up technique that usually begins by solving the smallest subproblems, the dynamic programming solves problems in a top-down fashion. 3. An important property of arrays is that their size and shape are constant. 4. If all of the elements stored in a list are of the same type, then the list is said to be heterogeneous. However, if different types of elements are stored in the list, then the list is said to be homogeneous. 5. A queue is a dynamic set that obeys the LIFO property. 1. The computer hardware recognizes only assembly language instruction. 2. A program written in the assembly language of one microprocessor can run on a computer that has a different microprocessor. 3. Assembly languages are platform-independent, but high-level languages are not platform-independent. 4. The 4GLs are also called nonprocedural languages. 5. Each assembly language instruction corresponds to one unique machine code instruction.