评价对课程实施过程具有（ ）、鉴定、诊断和改进等作用。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28328' and id < 2317751 and id<>'2317751' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28328' and id > 2317751 and id<>'2317751' order by id asc limit 5