高频收发信机的作用是发送和接收高频信号。（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69014' and id < 4466926 and id<>'4466926' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69014' and id > 4466926 and id<>'4466926' order by id asc limit 5