It is easy to determine whether smoking is hazardous. Nicotine is poisonous.

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问题 It is easy to determine whether smoking is hazardous.
Nicotine is poisonous.

选项 A、Right
B、Wrong
C、Not mentioned

答案A

解析该题说的是：尼古丁是有毒的。答案可在第三段找到。

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