harmfulness

According to the results of third land desertification monitoring of Qinghai Province, this article analyzes the forming courses and harmfulness of land desertification in Qinghai and expounds the present achievements for land desertification treatment, furthermore, the further treatment advice has been made.

根据青海省第三次沙化土地监测成果，分析了青海沙化土地形成的过程和危害，阐述了目前沙化土地治理的成效，并提出进一步治理的建议。

Characteristics such as sudden, urgent, harmfulness, social, uncertainty and sense of organization of the social crisis of main analysis of this text, etc* Part three: Necessity of social crisis management of our government.

本文主要分析了社会危机的突发性、紧急性、危害性、社会性、不确定性和组织性等特点。第三部分：我国政府社会危机管理的必要性。

This paper introduced the harmfulness of tar acid produced by industry equipment, pointed out the shortcoming of several traditional method of getting rid of tar acid, gave out the measures to remove a small amount of tar by electrostatically enhanced cyclone separators.

介绍了工业设备产生焦油的危害性，指出了几种传统去除焦油方法的缺点。在理论和实验上分析了静电旋风除尘器去除少量焦油的可行性，给出了去除少量焦油的措施方法。