对河北交通学校监理专业1～4年级160名男生,采用不记名填表方式进行吸烟情况调查,年龄16～21岁。有吸烟史的105人,其中成瘾者8人,其余每天吸1～8次不等。一至四年级吸烟率分别为:21.95％、76.14％、81.82％、82.93％,有随年级升高而增高的趋势。根据调查表格中填写的吸 A total of 160 male students from grade 1 to grade 4 in Hebei Transportation School were investigated by smoking by means of anonymous form-filling, aged 16-21 years. There are 105 people with a history of smoking, including 8 addicts, the rest 1 to 8 times a day smoking. The smoking rates from the first grade to the fourth grade were 21.95%, 76.14%, 81.82% and 82.93%, respectively, which increased with the grade. According to the questionnaire fill in the suction