通常将固体和液体介质的耐热性划分为若干个等级，Y(0)级对应的极限温度是（   ）℃。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69041' and id < 4468207 and id<>'4468207' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69041' and id > 4468207 and id<>'4468207' order by id asc limit 5