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2010-2011(一)计算机专业英语试题


Translate the following paragraphs into Chinese.
1.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. 2.Personal computer software is based on specific operating systems and machines.Operating systems software defines the ‘personality’ of the computer by specifying the way in which programs are controlled , files are stored and retrieved , and how the system’s hardware components and held together.Software written to run on a specific PC operating system can’t run on another.To use PCs effectively,one must understand the capabilities of their operating systems software. 3.An application software (also called end-user program) is any program designed to perform a specific function directly for the user or , in some cases , for another application program.Examples of application software include word processors;database programs;Web browsers;development tools;drawing,paint,and image editing programs;and communication programs.Figuratively speaking,application software sits on top of system software because it is unable to run without the operating system and system software. 4.Ironically, in order to become easier to use for this new audience, programs have become far more sophisticated. Gone are the days when users typed in cryptic commands at esoteric prompts, only to see a stream of raw data. Today’s programs use sophisticated “user-friendly interfaces,” involving multiple windows, menus, dialog boxes with which we’ve all become familiar. The programs written to support this new approach are far more complex than those written just ten years ago. 5.Some of the benefits and flexibility of object-oriented programming stem from this separation of function invocation and implementation. The invocation of a functionality is termed "the sending of a message to an object." The execution of its implementation is termed "the receiver of the message executes the corresponding method." The separation of message and method greatly adds to the flexibility possible in an object-oriented program. In our example messages are sent to the plane objects. Each plane object receives a message and executes its desired behavior. In effect, our program "computes" by sending messages to all participating objects. In general, we can observe an object-oriented program as a collection of objects that communicate by sending messages.


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