填空题

Ammonia added in cigarettes allows smokers to inhale more nicotine.

【参考答案】

Y
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填空题
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.
单项选择题
A) feelings C) brains B) stories D) hearts
A．feelings
B．stories
C．brains
D．hearts
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