1/0设备与主存储器之间由硬件组成的直 接数据通路是 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29841' and id < 2421842 and id<>'2421842' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29841' and id > 2421842 and id<>'2421842' order by id asc limit 5