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The host is the most important. People input data to the host computer through keyboard, mouse and other input devices. After data processing by the host computer, the results are output to us through output devices such as displays and printers. The main components of the host include: memory, hard disk, motherboard, graphics card, sound card, optical drive, floppy drive, etc. Now many graphics card-like components can be integrated into the motherboard. CPU is also called central processing unit. CPU is the abbreviation of Central Processing Unit in English. As important as people's brains. It directs and dispatches all the work of the computer. Usually we refer to the CPU model when we say Ben 2, Ben 3 and Ben 4.为了节省开支，学校决定取消音乐课，作为音乐老师，马蒂（亨利·温克勒 Henry Winkler 饰）即将面临被解雇的命运。马蒂的悲惨遭遇点燃了斯科特的斗志，他决定帮朋友一把。通过打地下拳击赛，斯科特筹得了资金保住了音乐课在学校里的地位，他的这一举动却遭到了他人的误解。但是，在斯科特的内心里，放弃还是坚守，这个问题的答案早已了然于心。大家可不想去喝茶。Launch of new products or functions: In essence, adding functions will open up new attack areas for attackers, which is conducive to their quick exploration. This is why it is necessary (but difficult) to provide zero-day defense when new products are released.Public Memento createMemento () {