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Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest dista
Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest dista
admin
2017-03-25
26
问题
Recent research from animal behaviorists suggests that "as the crow flies" should no longer be taken to mean "the shortest distance between two points. " Zoologists at Oxford University,【C1】______conducted an eighteen-month【C2】______of homing pigeons, have concluded that under some circumstances, pigeons follow【C3】______visual landmarks to find their way home【C4】______than taking the shortest, most direct route.【C5】______for their ability to navigate long distances, homing pigeons use the【C6】______of the sun and stars, their inbuilt compasses, and perhaps also their sense of smell to direct their flight over long【C7】______or on a journey for the first time.【C8】______, different factors appear to affect a pigeon’s navigation【C9】______it is released close to its【C10】______. Animal behaviorists reached this【C11】______after attaching small global positioning devices to the backs of pigeons and releasing them a few miles from their home. These devices enabled the scientists to【C12】______the precise location of each pigeon every second of【C13】______flight. Each pigeon was tracked for approximately twenty flights from the【C14】______point. For the first several flights, each bird’s path【C15】______significantly from the paths it had taken【C16】______Subsequently, 【C17】______, the bird would tend to follow the same path, 【C18】______after flight, even though that path was not always the most direct route home. The scientists concluded that pigeons use a【C19】______of familiar visual landmarks to find their way when they are near their home rather than relying primarily on compass navigation. Major highways are one【C20】______landmark. Almost comically, some of the pigeons followed the path of a major highway they could see below them, turning where the road turned, and even following the circular path of the exit ramps.
【C11】
选项
A、decision
B、idea
C、conclusion
D、summary
答案
C
解析
此处空格处句子的意思是,动物学家通过给信鸽安装小型全球定位装置,将它们放到离家几公里的地方来做实验,可以得到信鸽有什么行为的结论。故此处想表达的是通过这个实验得到了结论,“conclusion”有“结论,推理”的意思,符合题意,为正确选项。
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