【填空题】The ____are stand-alone storage devices that hold data temporarily.
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【填空题】 Registers can hold____, ____, and also function as a ____.
【填空题】 A ____bus, an ____bus, and a____bus connect the CPU and memory.
【填空题】There are two methods to handle the addressing of I/O devices: ____I/O and ____I/O.
【填空题】 To run an instruction in a program, the CPU first ____the instruction, ____it, and then____it.