智能变电站中数据通信网关机发给测控装置的遥控跳闸信号采用（ ）传输。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29471' and id < 2398737 and id<>'2398737' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29471' and id > 2398737 and id<>'2398737' order by id asc limit 5