500km的架空线属于(    )。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69462' and id < 4498601 and id<>'4498601' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69462' and id > 4498601 and id<>'4498601' order by id asc limit 5