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
外语
When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important
When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important
admin
2013-03-25
90
问题
When animals make long journeys across places where there is no food or shelter, such as deserts or oceans, it is very important that they should be able to find their way accurately.
Birds find their way by the stars at night and by the sun during the day. People thought that this was impossible. Then some scientists made an experiment. They put some migrating birds(候鸟)in cages inside a planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the birds began to fly to the sides of the cage. Every time he moved it, the birds moved to a new position. Scientists discovered that they always flew toward the direction in which they would have flown if the sky had been real. This proved that they could see the stars and respond to them.
Many animals, especially birds, have a very precise sense of time, which is called their “internal clock”. In cloudy weather, birds delay setting off on long journeys, but if the cloud lasts for a long time, they must go at last, to complete their migration in time. In such conditions, they are able to steer(引导)by following the magnetic field(磁场)of the earth. We could say that they have their own special compass inside them, which tells the right direction to go.
Most migrating animals travel in groups, sometimes in very large numbers. This makes it more likely that they will find the right way, especially when the group has experienced animals which have made the journey before.
The phrase “internal clock” means ______ .
选项
A、a clock that is built inside the bird
B、a clock that tells correct time
C、an exact sense of direction
D、an accurate sense of time
答案
D
解析
细节题。根据第_一段第一句Many animals, especially birds, have a very precise sense of time, which is called their “internal clock”. 可知, 很多动物, 尤其是候鸟有一种很精确的时间感和方向感, 故选D。
转载请注明原文地址:https://kaotiyun.com/show/bBeK777K
本试题收录于:
大学英语三级A级题库大学英语三级分类
0
大学英语三级A级
大学英语三级
相关试题推荐
WhichofthefollowingstatementsisTRUEaccordingtothefirstparagraph?Fromthethirdparagraphwelearnthat______.
Shewearsthesamedress______sheworeatthewedding.
Themanagerhopedtobe______ofhowourbusinesswasgoingon.
Whydoteenagegirlsavoidmathematicscourses?Inwhatwaycanstudentsbebesttrainedinmathematicsandscience?
A、Passportsandchecks.B、Ticketsandpassports.C、Passports.D、Tickets.B细节题。女士问:“我可以看一下你的护照和票吗?”男士补充说;“这是免税商店,拿着护照和票才可以进(bead
Whatwillhappenifyougivea"Hmmm"responsewhenyourbosssays,"$4.65anhour"?Whatdoes"mostbusinessesdowithoutase
BythefirstsentenceinPara.1,thewriterprobablymeans______.Inthewriter’sopinionitwouldbebetterifpeople______.
A、Somefoodandvegetables.B、Somefruit.C、Somesugar.D、Somejuiceandwine.A
Nosoonershe______(finish)readingthenewspaperwhenstudents’questionsbeganarising.
随机试题
A.血小板数量减少B.多种凝血因子消耗性减少C.遗传性凝血因子缺乏D.血管壁功能异常E.多种凝血因子合成障碍肝功能不全出血原因
气相色谱仪除了载气系统、柱分离系统、进样系统外,其另外一个主要系统是
【背景资料】A、B、C、D、E五家施工单位投标竞争一座排8MPa的天然气加压站工程的承建合同。B施工单位在投标截止时间前两天已送达了投标文件,在投标截止时间前1小时,递交了其法定代表人签字、单位盖章的标价变更文件。A施工单位在投标截止时间后10分
166.根据相关法律规定,张某应当将()作为本案的被告。170.对于期货公司的行为,中国证监会应当给予()监管措施。
下列属于非公开增发新股的认购方式的有()。
ABC公司于2004年12月1日与XYZ租赁公司(系外商独资企业)签订了一份设备租赁合同。合同主要条款如下:(1)租赁标的物:大型轧钢设备。(2)起租日:2004年12月31日。(3)租赁期:2004年12月31日至2006年12月
下列各项企业财务管理目标中,能够同时考虑资金的时间价值和投资风险因素的是()。
旅游饭店星级评定的依据有()。
依照合同法规定,下列债权不得转让的是()。
人民民主专政具有鲜明的中国特色,表现在()
最新回复
(
0
)