A questionnaire survey was conducted in 620 middle school students to explore the effects of present mass media communication on smoking knowledge, attitude and behavior.
为研究目前大众传媒对青少年吸烟知识、态度、行为的影响，文中对620名中学生进行了吸烟问卷调查。
A questionaire survey was conducted in 620 Beijing middle school students to study the influence of smoking attitude on smoking intention and behavior.
为研究吸烟态度对吸烟意向和行为的影响，文中对北京市620名中学生有关吸烟态度。意向及行为进行了问卷调查。
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