曲线 在点  处的切线斜率为（  ）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='14439' and id < 1194147 and id<>'1194147' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='14439' and id > 1194147 and id<>'1194147' order by id asc limit 5