The career motivations of student enrollment are the internal motive to carry out the plan.

By compiling of questionnaire of career motivation of undergraduates,which involved 2755 undergraduates from 15 universities in 7 provinces in China,the impact on the undergraduates\' career motivation given by family factors are revealed.

The university students\' learning motivation and career motivation influence each other,mutual promote and commonly plays an important role in the development of the students and the formation of personality.

Analysis of Sterile Male Semen of Occupational Drivers;

Based on China s national conditions, the paper makes an exploration of buildi ng a reasonable occupation mechanism of tourist guides.

The land requisition rules and employment policies,the human capital and social capital of themselves constrained land-expropriated farmer s occupational mobility towards un-farming area.

The scholar not only researched the basic situation ,characteristic and influence factor of the occupational mobility in our country on the whole,but also researched the mobility between generations and the mobility in one s life,which are the important standards reflect the level and condition of social development.

Based on empirical social survey data,we find that the occupational mobility rate in urban China is still low,while lots of workers are willing to change their job career yet fail to do so.