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  3. In many ways, though, definition Of such skills is quite unnecessary for an analysis of policing. It is really most unlikely tha

In many ways, though, definition Of such skills is quite unnecessary for an analysis of policing. It is really most unlikely tha

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问题     In many ways, though, definition Of such skills is quite unnecessary for an analysis of policing. It is really most unlikely that the average police officer will ever in his career perform or even witness those detective skills that he has enjoyed in countless TV productions. The reason for this is simply that the vast majority of crimes are usually either very likely to be solved by routine investigation or they are very unlikely to be solved at all. Fortunately, the clear-up rate for serious crimes tends to be very high. Zander (1979) has shown why. In his study of old bailey cases, the identity of the defendant(被告) seems to have been reasonably clear in 87% of cases. Morgan (1980 and ongoing) has shown that well over 92% of crimes known to the police are discovered by the public who provide the majority of decisive information. In Morgan’s study, crimes that were "solved" contained in their crime files over twice the amount of qualitative information as crimes that were not "solved". The various bits of information in the crime files were each rated by experienced police investigators on a Likert scale of value in terms of probability of detection, "solving" of the crime. In this, where information was provided by the public during a police interview, the information was believed to the police "since it was felt that in an interview genuine police skills are involved in the collection of information. " Evidently this method can be justified thus, but will necessarily overestimate the police role. Nevertheless, in this analysis of crime files it was shown that in cases where crimes were solved, the public still provided nearly twice the amount of information as the police.
According to Morgan, the solving of the overwhelming majority of crimes depends largely on ______.
选项 A、the police’s collecting evidences on the site of the crime
B、experienced police investigators’ rating information in the crime files
C、information collected by the police in police interviews
D、information provided by the public who discovered the crime
答案D
解析 在解答上一题的基础上，再将注意力集中于depends largely on(主要取决于)这一概念，寻找破案的主要原因。原文中有这样两句："Morgan (1980 and ongoing) has shown that well over 92% of crimes…the public who provided the majority of decisive information"; "in cases where crimes were solved, the public still provided nearly twice…as the police"。显然，文中多处强调大众所提信息的关键作用。
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