An　instruction　is　made　up　of(41)　that　specify　the　function　to　be　performed　and　operands　that　represent　the　data　to　be　operated　o

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问题 An　instruction　is　made　up　of(41)　that　specify　the　function　to　be　performed　and　operands　that　represent　the　data　to　be　operated　on.　For　example,　if　an　instruction　is　to　perform　the　operation　of(42)　two　numbers,　it　must　know(43)　the　two　numbers　are.　The　processor’s　job　is　to(44)　instructions　and　operands　from　memory　and　to　perform　each　operation.　Having　done　that,　it　signals(45)　to　send　it　next　instruction.

选项 A、hard　disk
B、register
C、memory
D、cache

答案C

解析指令是由指定功能的操作(operations)和代表被处理的数据的操作数组成。例如，如果一条指令实现两个数的加法(adding)，则它必须知道操作数在哪里(where)存放。处理器是用来自内存获取(get)指令和操作数，并执行指令。当本条指令处理完后，它通知内存(memory)发送下一条指令。

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