Cigarette Smoking by Grade Level:2005-2009 Which grade had the highest percentage of smokers in 20057

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问题 Cigarette Smoking by Grade Level:2005-2009
   
Which grade had the highest percentage of smokers in 20057

选项 A、The 9th.
B、The 10th.
C、The 11th.
D、The 12th.

答案C

解析 通过2005年对应的数轴可知,当年抽烟者所占比例最高的年级为11年级。故选C。
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