Based on farm household investigation data,the paper,taking the three sample villages as case,studies the employment cluster by farm household in rural areas of central China.

On the present situations and countermeasures of protecting university student s legitimate rights and interests in a part-time job;

Development and application of fishing tools of plug for eccentricity hole;

Regarding this scenario, the author developed a releasable fishing tool which can be withdrawn by lifting and running operations, and has developed two series of such tools.

The polished rod fishing tool is a new type of fishing tool and is mainly used to fish long slim, not heavy rod type fishes.

This paper summarize the mechanism and the research development at home and abroad of the enzymatic beating,hoping to direct to choose the rational enzymatic beating technology,control correctly the influencing factor of beating and exert fully the beating efficacy.