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我们于1991年10月对海军某水面舰艇部队艇员进行了吸烟状况调查,报告如下。 1 调查对象和方法对象为海军某水面舰艇部队海勤人员。采取填写吸烟状况调查表的方式。共收回有效答卷2118份,吸烟者为
In October 1991, we conducted a survey on the smoking status of some Navy surface naval forces crew members. The report is as follows. 1 The object and method of the survey are the naval personnel of a certain surface naval unit of the navy. Take the form to fill in the smoking status questionnaire. A total of 2118 valid responses were collected from smokers