a digital computer is a system composed of four distinct elements: a central processing unit, input devices, memory storage devices, and _____ devices. A、hard wareB、outputC、monitorD、hard disk
a digital computer is a system composed of four distinct elements: a central processing unit, input devices, memory storage devices, and _____ devices.
A、hard ware
B、output
C、monitor
D、hard disk
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The equivalents of millions of telephone （ ） are transmitted on a single fiber,thinner than a human hair.A．calls B．lines C．talks D．devices
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