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  3. Google already has a windowinto our souls through our Internet searches and it now has insight into our ailing(生病的；体衰的)bodies to

Google already has a windowinto our souls through our Internet searches and it now has insight into our ailing(生病的；体衰的)bodies to

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问题     Google already has a windowinto our souls through our Internet searches and it now has insight into our ailing(生病的；体衰的)bodies too. The Internet giant is using its vast database of individual search terms to【C1】______the emergence of flu up to two weeks【C2】______government epidemiologists. Google Flu Trends uses the【C3】______of people to seek online help for their health problems. By tracking【C4】______for terms such as "cough" , "fever" and "aches and pains" , it claims to be able to【C5】______estimate where flu is【C6】______
    Google tested the idea in nine regions of the US and found it could accurately predict flu【C7】______between 7 and 14 days earlier than the federal centres for disease control and prevention. Google hopes the idea could also be used to help【C8】______other diseases. Flu Trends is limited【C9】______the US. Jeremy Ginsberg and Matt Mohebb.
    Two software engineers【C10】______in the project, said that【C11】______in Google search queries can be very【C12】______In a blog post on the project they wrote: "It turns【C13】______that traditional flu surveillance systems take 1 to 2 weeks to collect and【C14】______surveillance data but Google search queries can be【C15】______counted very quickly. By making our estimates【C16】______each day, Flu Trends may provide an early-warning system for outbreaks of influenza. " They explained that【C17】______health information would be kept【C18】______"Flu Trends can never be used to identify individual users【C19】______we rely on anonymised(匿名的), aggregated(汇总的)counts of how often certain search queries【C20】______each week. "
【C18】
选项 A、essential
B、confidential
C、substantial
D、potential
答案B
解析 空格所在句的意思是：他们还解释说，私人的健康信息会被—一。confidential意为“秘密的，机密的”，keep confidential意为“保守秘密”，符合题意；其他三项essential意为“实质的，本质的”，substantial意为“坚固的，实质的”，potential意为“潜在的”，均不符合题意，故选B。
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