“捧着一颗心来，不带半根草去。”陶行知这句话强调的是教师应具有 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25991' and id < 2181378 and id<>'2181378' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25991' and id > 2181378 and id<>'2181378' order by id asc limit 5