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考研
By saying "let nature take its course", the biologists mean______. Canine parvovirus is a disease which______.
By saying "let nature take its course", the biologists mean______. Canine parvovirus is a disease which______.
admin
2010-06-17
84
问题
By saying "let nature take its course", the biologists mean______.
Canine parvovirus is a disease which______.
选项
A、the pups are immune from
B、only spreads among domestic dogs
C、is hardy enough to keep alive for months in the soil
D、only hits wolves on the northern range
答案
C
解析
事实细节题。这个题目是关于犬类疾病的,选项A"幼犬对该疾病有免疫力",根据第二段"That pups have suffered the decline seems to suggest the culprit is parvo, said Ed Bangs,"Nursing pups receive immunity from their mother’s milk, but the immunity drops when nursing stops."可知,正是由于幼犬没有免疫力才感染这种疾病,造成数量下降的;B"只在家养犬中传播",根据第四段"the disease spread rapidly to domestic dogs and then into wild animal populations"(除了在家犬中传播外,这种疾病还会蔓延到野生动物中去)可判断这与文章内容不符;C"这种疾病非常顽强,可以在土壤中存活几个月",根据第四段"Because parvo it so hardy, "persists in the soil for months."一句可知这是正确论述;D"只对北方区域的犬造成影响",而第四段说的是"The disease has hit wolves on the northern range… especially hard."指这种疾病在北方区域的犬中尤为厉害,而并不是只会影响北方区域的犬。
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0
考研英语一
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