CAD入门学习大全(国外英语资料).doc

CAD入门学习大全(国外英语资料) AutoCADAutoCAD computer systems consist of two subsystems, the hardware Hardware and the software Software. Hardware means the formation of all physical devices and devices of a computer. It consists of mainframe and peripheral equipment. The host includes the central processing unit CPU (central, process, unit), and memory (memory) And interface. External devices include terminals, printers, disks, etc.. Do, you, remember? Software, by system software (such as DOS, Windows, etc.) and should Using software (such as Office2000, AutoCAD, etc.). No? Software hardware called bare exergy is unable to work alone. The hardware is like a human body exergy software is the ability of thinking more of the computer software exergy exergy is strong. ? is divided into three grades, exergy development layer and user layer layer can be roughly using computer system maintenance. The user layer uses ready-made applications developed by others. The development layer is programmed in some language and debugged. System maintenance layer Maintenance and expansion of resources. ?? Different grade rate to different rate requirements of users with different levels of computer knowledge. The highest rate of user layer in high rate below the rate more hardware and software more abundant use rate The easier it is. So the rate to top users of low rate and the bottom of the computer to deal with the higher requirements of users. Auto CADAutomatic computer aid design computer aided design AutoCAD is the most popular computer aided drawing program designed by Autodesk company in the world. AutoCAD allows you to draw very simple or very complex graphics at amazing speed and accuracy. The use of AutoCAD drawing two-dimensional graphics or 3D space model and drawing rate Make a realistic picture of the effect. Auto CAD? AutoCAD is a complete set of 2D CAD applications. It provides a comprehensive tool for drawing, editing and dimensioning. The user can draw numerous layers exergy ca