In or der to ensure normal tea chi ng or der, prote cting students ' healt hy growt h, e nsuri ng that national (pr operty) is not lost, to prev ent or minimize t he occurre nce of safety accidents, fol low t he "preve nt, rescue each ot her, ensure safety and reduce losses" pri nci ple, accordi ng to the l ocal conditions, make the ma nagement system. 1, t he principal is the responsi bilit