首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
医学
A、A primitive type of nest. B、An elevated nest. C、A typical cup-shaped nest. D、A nest of twigs and branches. A从“every spring a m
A、A primitive type of nest. B、An elevated nest. C、A typical cup-shaped nest. D、A nest of twigs and branches. A从“every spring a m
admin
2013-12-06
89
问题
Many egg-laying animals merely lay their eggs and leave. Turtles for instance, the eggs hatch on their own. The current theory about birds is that the earliest birds did just that when they were cold-blooded creatures living in warm places. However when they became warm-blooded creatures living in cold places they had to remain on the eggs to keep them warm. The process we call incubation. For this they needed a place to nest. Very likely the first nests were just primitive depressions scrape into the ground. Even now many species still lay eggs in this sort of crude nests. In fact every spring a mother killdeer lays her in some pebbles along the edge of the parking lot just outside this building. Primitive nests on the ground were fine for some birds but others began to elevate their nests in branches perhaps to avoid predators. These early elevated nests were probably loose platforms of sticks and twigs—the types still built by ospreys and most Arians today. The latest evolvement in nest, the most recent version, so to speak, is the cup-shaped nest. This is the one we regard today as the typical bird’s nest, you know, like a robin’s nest.
Questions 26-30 are based on the passage you have just heard.
26. What is the main topic of the Passage?
27. What evolutionary change in birds led to nest building?
28. According to the speaker, where were the first bird’s nests located?
29. What is the killdeer’s nest in parking lot an example of?
30. According to the speaker, what is a possible reason that birds began to build nests in trees?
选项
A、A primitive type of nest.
B、An elevated nest.
C、A typical cup-shaped nest.
D、A nest of twigs and branches.
答案
A
解析
从“every spring a mother killdeer lays her in some pebbles along the edge of the parking lotjust outside this building.Primitive nests on the ground were fine for some birds”可知。killdeer是小水鸟的一种,产于北美。
转载请注明原文地址:https://kaotiyun.com/show/GSU3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
Workhasleftyoufrazzled.Yourlegsachewhenyougetbackfromthegymdon’tpopthoseaspirinsjustyetthinkhotsprings.
Workhasleftyoufrazzled.Yourlegsachewhenyougetbackfromthegymdon’tpopthoseaspirinsjustyetthinkhotsprings.
RobertSpring,a19thcenturyforger,wassogoodathisprofessionthathewasabletomakehislivingfor15yearsbyselling
RobertSpring,a19thcenturyforger,wassogoodathisprofessionthathewasabletomakehislivingfor15yearsbyselling
RobertSpring,a19thcenturyforger,wassogoodathisprofessionthathewasabletomakehislivingfor15yearsbyselling
RobertSpring,a19thcenturyforger,wassogoodathisprofessionthathewasabletomakehislivingfor15yearsbyselling
Peoplewholiveandworkinareaswithelevatedlevelsofozoneandotherairbornepollutantsappeartorunanincreasedriskof
Peoplewholiveandworkinareaswithelevatedlevelsofozoneandotherairbornepollutantsappeartorunanincreasedriskof
随机试题
项目施工危险源辨识常采用()方法。
硬化混凝土的弹性模量受骨料弹性模量影响最大,()。
货币市场与股票市场的一个主要区别是()。
可以依法征收房地产的主体是()。
甲旅行社与乙旅行社在旅行合同中都没有按照合同约定履行义务,对此,()违约责任。
认为学习的实质就是观察的心理学家是()。
树根对于()相当于树对于()
在考生文件夹下完成如下简单应用。1.打开表单myform4-4,把表单(名称为Forml)标题改为“欢迎您”,将文本“欢迎您访问系统”(名称为Labell的标签)改为25号黑体。最后在表单上添加“关闭”(名称为Commandl)命令按钮,单击此按
A、$1,800,000,000.B、$18,000,000.C、$80,000,000,000.D、$80,000,000.A
A、148billion.B、140million.C、1480million.A文中明确告知每年因官员腐败而损失的国家资金为1480亿美元,考察考生对数字识别的敏感度。PresidentObasanjo尼日利亚总统奥巴桑乔。
最新回复
(
0
)