propagand

Objective:To understand the knowledge level and attitude of school students about AIDS and their behavious factors,and to provide accordance for school propagand plans.

目了解专生艾滋病知、态、行现状，为学校制定艾滋病宣传策略提供依据。

The paper expounds in detail the relation between oil density and metering and suggests that it is necessary to propagand metrical knowledge to customers.

详细阐述了油收发过程密度与计系,并提出了向客户宣传计知识必要性。