Fig. 1. Cumulative preadult mortality rate of Bemisia argentifolii, originating from three groups of host plant, on six
图源类作物的银叶粉虱在六种杂草的成虫前期累


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六级听力真题精听
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家地理科普(视频版) Health officials are most concerned about the high mortality rate of the disease. The World Health Organization (WHO) lists the Nipah virus as a developing disease that could cause a global pandemic. Ebola and Zika are also on this list.
卫生官员最关心的是这种疾病的高死亡率。世界卫生组织(WHO)将尼帕病毒列为可能蔓延至全球的流行疾病。这一名单上就包括埃博拉病毒和寨卡病毒。
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7月合
7月合
1月合
During the early 1900s, pneumonia had a reported 30-40% fatality rate; and in a 2010 analysis of over one million elderly patients hospitalized in the US with pneumonia, the mortality rate was 11% within 30 days of admission.
据报道,在20世纪初,肺炎的致死率为30-40%;2010
,一项对美
100多万因肺炎住院的老
患者的分析显示,在入院30天内,死亡率仅为11%。