問題詳情

   The researchers found that enveloped viruses were able to recover infectious virions(complete viral particles) from the toy up to 24 hours after the toy's contamination at 60percent relative humidity, and up to 10 hours at 40 percent relative humidity. Envelopedviruses have a protective outer layer that may help them survive and infect other cells.    "People don't really think about getting viruses from inanimate objects," said lead authorRichard Bearden II. "They think about getting them from other people. Children are __22__infectious disease because they put their hands and foreign objects in their mouths, and theirimmune systems aren't fully developed."   Toys may be an important channel for the transmission of viral diseases among children.In particular, toys in common play areas in healthcare settings have been implicated as__23__ for outbreaks of viral illness. However, it has remained unknown how longenveloped viruses can survive on inanimate objects, __24__ it difficult to assess the potentialrisk of infection and design effective control measures, such as disinfection. This studyinvestigated how long __25__ for an enveloped virus to become inactive on the surface of achildren's toy at typical indoor temperatures and relative humidity levels. Thus, certainmeasures can be taken to prevent the spread of disease. (http://www.news-medical.net/news)
21.
(A) on the verge of
(B) on the prowl for
(C) at risk for
(D) on the threshold of

參考答案

答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

內容推薦

內容推薦