每年的5月31日是世界无烟日.香烟燃烧产生烟气中含有许多强致癌物质,其中对人体危害最大的是尼古丁(化学式为C 10 H 14 N 2 )、焦油和一氧化碳等.下列说法错误的是( )
A.
学校应当成为无烟场所
B.
尼古丁由碳、氢、氮三种元素组成
C.
C 10 H 14 N 2 中,碳、氢、氮三种元素的质量比是10:14:2
D.
CO能与血液中的血红蛋白结合,使血红蛋白携氧能力降低
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