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2.1.5 向访问者承诺物质奖励因特网上有为数不多的站点能给访问者购买商品打折或给予奖金,但这需要访问者填写一份包括个人习惯、兴趣、假期、特长、收入等个人情况的调查问卷,因为有物质奖励,许多访问者都会完成由这些站点提供的调查问卷。2.1.6 用软件来检测访问者是否完成调查问卷访问者经常会无意或者有意地遗漏掉一些信息,
2.1.5 Promise Material Rewards to Visitors There are a few sites on the Internet that give discounts or bonuses to visitors to purchase goods, but this requires the visitor to fill in a personal profile that includes personal habits, interests, holidays, specialty, income, etc. Of the questionnaire, because of material rewards, many visitors will complete the questionnaire provided by these sites. 2.1.6 Using Software to Detect Whether a Visitor Completed a Questionnaire Visitors often omit some information either accidentally or intentionally,