Choose the best answer to the following questions according to the text we learnt. 1) A computer system consists of two main elements:_______. A. input devices, output devices B. h ardware, software C. CPU, memory D. RAM, ROM 2) The peripherals of the computer can be classified into two groups:__________. A. data Bus, cables B. pointing device, output devices C. in put devices, output devices D. control Bus, inner Bus 3) Users can type in text and commands using the________ , which is one of the most important input devices. A. mouse B. scanner C. microphone D. keyboard 4) The most useful pointing device is a ____________, which allows the user to point to elements on the screen. A. digital camera B. mouse C. PC camera D. keyboard 5) The characteristic of the LCD is _________. A. ta king up a lot of space B. taking up little space C. displaying text and images with greater unclarity D. A and C 6)__________is the control and data processing center of the whole computer system. A. Memory B. Motherboard C.CPU D. Bus 7)When the computer is turned off ; any information in ___________ A. RAM B. ROM C. storage D. memory 8)__________ is the most popular Bus to be used on a motherboard. A. Address Bus B. Data Bus C. Control Bus D. PCI Bus 9). Two mam components on the motherboard are ___________. A. memory and circuit boards B. CPU and memory C. arithmetic unit and control unit D. ROM and RAM 10)_________ does not belong to the output devices. A. facsimile machine B. headset C. speaker D.micr ophone