单选题How did the researchers do the experiment?ABy inviting the volunteers to have a long class.BBy asking the volunteers to pay attention to a clock.CBy monitoring brain activity while volunteers are watching a picture.
单选题
How did the researchers do the experiment?
A
By inviting the volunteers to have a long class.
B
By asking the volunteers to pay attention to a clock.
C
By monitoring brain activity while volunteers are watching a picture.
参考解析
解析：
细节理解题。根据文章第三段可知：研究人员通过观察12个志愿在看一幅画时的大脑活动来做研究。故选C项。
细节理解题。根据文章第三段可知：研究人员通过观察12个志愿在看一幅画时的大脑活动来做研究。故选C项。
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