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

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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.
In spite of the difficulties, according to the text more than thirty-five million people a year give up smoking.

选项 A、Y
B、N
C、NG

答案B

解析
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