Being plugged into an iPod is a feature of adolescence. A new study suggests that teens who spend too much time listening to mus

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问题    Being plugged into an iPod is a feature of adolescence. A new study suggests that teens who spend too much time listening to music may be at higher risk of depression.
The study found that teens who reported listening to music more often—【C1】________using other types of media like TV and books—were more likely to have major depressive disorder,【C2】________with teens who listened to music less frequently. With each level increase in music use, teens had an 80% higher risk of depression, the study found. The study didn’t measure【C3】________listening times, but based on previous data, the study authors【C4】________that teens in the highest-use group were likely listening to music【C5】________at least four or five hours a day.
At this【C6】________it is not clear whether depressed people begin to listen to more music to【C7】________or whether listening to large【C8】________of music can lead to depression,  or  both.【C9】________researchers  found  that reading books had the opposite【C10】________: with time spent in reading increasing, teens’ risk of depression【C11】________50%. This is worth emphasizing because overall in the U.S., reading books is decreasing,【C12】________nearly all other forms of media use are increasing.
For the study, the researchers【C13】________106 participants aged 7 to 17 for two months; 46 participants had been previously【C14】________with depression. Throughout the course of the study, researchers made【C15】________weekend phone calls to the teens in order to determine, in real time, what forms of media they were using,【C16】________television, music, video games, Internet, magazines and books. On average, teens were most likely to be watching a movie or TV when researchers called (26% of the time). Teens reported listening to music 9% of the time, followed by Internet use and video gaming (6% each) and,【C17】________, reading printed media (0.2%).
Of all the media reported, only music showed【C18】________associations  with  increased  depression  risk,【C19】________researchers had control of【C20】________like age, sex and race.
【C20】

选项 A、factors
B、methods
C、species
D、figures

答案A

解析年龄、性别和种族都是影响调查结果公平公正性的外在因素，所以要控制好，故选A项factors“因素”。B项methods“方法”，C项species“物种”，D项figures“数字、人物”都不能同时概括或包含年龄、性别和种族这三个类别。

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考研英语二

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