... ung duge cdc yeu edu sou: 1) NL phdi cd tinh khoa hgc, nghTa Id phdi chua dung cdc dge trung, ede ndi dung edn phdn tfeh mdt edeh rd rdng, khdng ndm trong trudng hgp ngogi le de ngudi hge ... tudng, dgo due, tinh cdm quy trgng, yeu min tilng Viet cung nhu y thuc giu gin sy trong sdng eua tilng Viet. Mudn ddm bdo duge ddc trung ndy, GV nen chgn lua cdc don vj ngdn ngu trong cdc tdc ... sdeh su dyng, nhung chung khdng ddm bdo tinh gido dye vd tinh thdm mT. GV hodn todn cd thi chgn nhung mdu NL khde ngdn ggn, chua dung nhieu thdng tin edn thiet cho ngudi hgc md Igi ldi hay...