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  3. A study by tracing the history of the emergence and spread of 335 infectious diseases from 1940 to 2004 provides a new point of

A study by tracing the history of the emergence and spread of 335 infectious diseases from 1940 to 2004 provides a new point of

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问题 A study by tracing the history of the emergence and spread of 335 infectious diseases from 1940 to 2004 provides a new point of view on ________.
Regions, such as tropical Africa, Latin America and Asia, have the greatest threats of newly emerging epidemics, but they have traditionally received ________.
选项
答案the least surveillance
解析 根据题于中的tropical Africa，Latin America and Asia 和 but they have traditionally received定位到原文第三段．．．more in monitoring regions such as tropical Africa，Latin America and Asia．These areas have the greatest threats of newly emerging epidemics．．．received the least surveillance。该段意思是：监测机构应该在非洲热带地区、拉丁美洲和亚洲等地区增加更多的监控投入。这些区域面临的新型流行疾病爆发的威胁最大，但其历来得到的监控却最少。题干是对原文第三段整段的概括和整合，读懂本段大意，即可根据原文找到正确答案为the least surveillance。
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