近日，中国人寿湖北黄冈分公司在全市开展了一次涉及面宽、层次多、对象广泛的社会问卷调查活动，调查对象包括公务员、工人、个体工商业者、农民到下岗职工和在校学生等不同职业和阶层的群众，共发放问卷２８０００份，收回１９８７２份，其中有效卷１８７５６份，占发放份数? Recently, China Life’s branch office in Huanggang, Hubei Province, conducted a survey of social questionnaires covering a wide range of levels and a wide range of subjects in the city. The survey included civil servants, workers, individual industrial and commercial workers, peasants to laid-off workers and students in different occupations And the masses of the masses, issued a total of 28,000 questionnaires, 19872 to recover, of which 18,756 valid volumes, accounting for the number of copies issued?