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  3. Although nicotine is probably the well-known chemical in cigarettes, it is not necessarily the one that changes the psyche of th

Although nicotine is probably the well-known chemical in cigarettes, it is not necessarily the one that changes the psyche of th

admin2009-04-23  95
问题 Although nicotine is probably the well-known chemical in cigarettes, it is not necessarily the one that changes the psyche of the smoker when cigarettes are smoked.
Cigarette companies would have to cut the nicotine content in cigarettes by ______ to prevent them from being addictive.
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