在选择防护电器时，保护防护电器有效动作的电流不应大于回路载流量的（ ）倍。[单选]

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29215' and id < 2377540 and id<>'2377540' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29215' and id > 2377540 and id<>'2377540' order by id asc limit 5