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The second method: recovery in case of key failureA complete computer system consists of hardware and software. As the name implies, hardware is the physical equipment that can be seen and touched in the computer, such as the host computer. Software, on the other hand, is relative to hardware. It refers to various programs and related documents needed to run on the computer, such as a drawing software or a gobang game. Computer hardware and software are indispensable. Hardware is the material basis on which software can work and is the "body". Software is the soul of the computer and the core of controlling and operating the computer. They complement each other and form a complete computer system. From the appearance, the computer includes: monitor, host computer, keyboard, mouse and sound box.2. People: There must be the participation of several types of people: the attention and attention of superior leaders, the beating about the bush of safety experts, the focus of safety operation and maintenance engineers, and finally the assistance of application, system, business, network, monitoring, OA and other areas.如果再不小心被人利用，怎么死都不知道呢？回到临淄之后，田荣直奔王宫，他名义虽然只是齐国丞相，但是所有人都知道这位齐王的叔父才是齐国真正的主宰者。历史总是相似的。