A-A+
What is mainly talked about in this news item？
问题详情
What is mainly talked about in this news item？
A．The dangers of smoking.
B．The dangers of second-hand smoke.
C．The dangers of third-hand smoke.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：本新闻由吸烟的危害和吸二手烟的危害引出third-hand smoke这个概念，然后解释了它是什么，谁在研究它，所以，整段新闻的重点在the third-hand smoke。
