positive direction
6.Consider three mutually perpendicular coordinate lines( the -, -,and -axes ) with their zero point at a common point ,called the origin.The three axes form the right-handed system,that is,if the fingers of the right hand are curled so that they curve form the positive - axes toward the positive - axes ,the thumb points in the direction of the positive -axes .
9.This text synthesized to make use of the theories contact actual, compare the analysis and induce to cite proof, logic analysis etc. method, from our country the concrete characteristics that the public culture develop, positive and negative value, existent problem, development the direction proceeded with counterplan etc.

