“前加速”保护的优点是第一次跳闸是有选择性的动作，不会扩大事故。（   ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69379' and id < 4491618 and id<>'4491618' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69379' and id > 4491618 and id<>'4491618' order by id asc limit 5