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考研
According to the text; virgin-soil epidemics can be distinguished from other catastrophic outbreaks of disease in that virgin-so
According to the text; virgin-soil epidemics can be distinguished from other catastrophic outbreaks of disease in that virgin-so
admin
2010-05-05
33
问题
According to the text; virgin-soil epidemics can be distinguished from other catastrophic outbreaks of disease in that virgin-soil epidemics
It can be inferred from the text about the Native American inhabitants of Ungava Bay that they
选项
A、could scarcely ward off the fatal attack by the 1952 epidemic.
B、were immunologically defenseless against measles.
C、were the last native people to be struck by a virgin-soil epidemic;
D、did not come into frequent contact with White Americans until the 20th century.
答案
B
解析
推理判断题。本题问:从本篇课文中关于Ungava海湾的美洲印第安居民可以做出哪项推理?第4段第2、3句写道:"例如,1952年在魁北克省Ungava海湾居住的美洲印第安居民中爆发了一场麻疹,虽然有些人得益于现代医学,仍有99%的人口受到感染,7%的人口死亡。像这样的事例表明,即使在正常情况下,非致命性的疾病在袭击无免疫力的社区时,也会产生毁灭性后果"。由此可知,Ungava海湾的美洲印第安居民麻疹感染率与死亡率如此高的原因是他们对麻疹无免疫性抵抗力。
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0
考研英语一
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