在保护零线上可以装设开关或熔断器。（  ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69531' and id < 4505160 and id<>'4505160' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69531' and id > 4505160 and id<>'4505160' order by id asc limit 5