用微波炉加热食物时不能用金属器皿盛装食物，是因为（ )。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31814' and id < 2542705 and id<>'2542705' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31814' and id > 2542705 and id<>'2542705' order by id asc limit 5