In order to ensure normal tea chi ng order, pr otecti ng students ' healthy growth, e nsuring that national (property) is not l ost, to prevent or mi nimize the occurre nce of safety acci dents, follow t he "preve nt, rescue ea ch ot her, ensure safety and reduce l osses" pri nci ple, accor ding to t he local conditions, mak e the ma nagement system. 1, the principal is t he responsi bility of sch
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