已知甲、乙两数的和是300,甲、乙两数之差是50,则甲数是（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27159' and id < 2250228 and id<>'2250228' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27159' and id > 2250228 and id<>'2250228' order by id asc limit 5