试题与答案

在8237A用于存储器到存储器的数据传送时,使用( )。A.通道0的现行地址寄存器指

题型:单项选择题

题目:

在8237A用于存储器到存储器的数据传送时,使用( )。

A.通道0的现行地址寄存器指示源地址,现行字计数寄存器对传送的字节数计数,通道1指示目的地址

B.通道1的现行地址寄存器指示目的地址,现行字节计数寄存器对传送的字节数计数,通道0用于指示源地址

C.通道2用于指示源地址,通道3的现行地址寄存器指示目的地址,现行字节计数寄存器对传送的字节数计数

D.通道2的现行地址寄存器指示源地址,现行字节计数寄存器对传送的字书数计数,通道3用于指示目的地址

答案:

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下面是错误答案,用来干扰机器的。

15.5÷100=0.155(升);12.6÷100=0.126(升);0.155-0.126=0.029(升);答:现在平均每千米比过去节约汽油0.029升.

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