Why don’t birds get lost on their long migratory (迁居的) fligh
electronzjh2022-10-04 11:39:541条回答| Why don’t birds get lost on their long migratory (迁居的) flights? Scientists have puzzled over this question for many years. Now they’re beginning to fill in the blanks. Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly by night? Tests with artificial stars have proved conclusively that certain night-flying birds are able to follow the stars in their long-distance flights. One such bird, a warbler(鸣禽) , had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird’s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the direction of the make-be-live stars caused a change in the direction of his flight. Scientists think that warblers, when flying in daylight, use the sun for guidance. But the stars are apparently their main means of navigation (导航). What do they do when the stars are hidden by clouds? Apparently, they find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it’s too dark to see these, the warblers circle helplessly, unable to get their direction. 小题1:The reasons why birds don’t get lost on migratory flights__________.
|
已提交，审核后显示！提交回复
共1条回复
ph5119624 共回答了19个问题 |采纳率78.9%- 小题1:C
小题2:B
小题3:B
小题4:A
鸟儿如何辨别方向？文章给出了答案。
小题1:推理题。根据第一段最后一句Now they’re beginning to fill in the blanks.可知很久以来人们都搞不清楚，只是到了最近才弄明白。
小题2:细节题。根据第2段2,3行Yet it showed an inborn ability to use the stars for guidance.
小题3:细节题。根据最后一段倒数第3行they find their way by such landmarks as mountain ranges。
小题4:主旨大意题。通读全文可知文章是关于用一个特别案例在发现问题的答案。 - 1年前
相关推荐
- 英语翻译Why don’t birds get lost on their long migratory (迁移的) f
英语翻译
Why don’t birds get lost on their long migratory (迁移的) flights?Scientists tried their best to find the answer to this question for many years.The reasons have been discovered only lately.
Not long ago experiments showed that birds depend on the sun to guide them during daylight .But what about birds that fly mainly by night?tests with man-made stars have proved that certain night-flying birds are able to follow the route in their long distance flights.
One such bird ,a warbler (鸣禽),had spent its lifetime in a cage and had never flown under a natural sky.Yet is showed its ability by birth to use the stars for guidance.The bird's cage was put under a man-made star-filled sky at migration time .The bird tried to fly in the same direction as that taken by other birds in the building.Any change in the position of the make-believe (虚构的) stars caused a change in the direction of its flight.
Scientists think that warblers,when flying in daylight,use the sun for guidance.But stars are clearly their important means of navigation(导航).What do they do when the stars are hidden behind the clouds?Clearly,they find their way by such land marks as mountains,coastlines and river courses.But when it's too dark to see these,the warblers circle helplessly ,unable to find out where they were.白尘20061年前5 -
shiwuxian 共回答了20个问题
|采纳率100%为什么鸟类在它们的迁徙之旅中没有迷路呢?多年来,科学家们试图找到这个问题的答案.
直到目前,这些答案才被发现.不久前,实验显示,在白天,鸟类依靠太阳来当指引.
但是在夜间飞行的鸟类呢?
人造卫星的测试证明,一些夜间飞行的鸟类能在它们的长距离飞行中跟着路线走.
有这样一种鸟,鸣禽.它的整个生命都是在笼中度过的,它从未在自然界的天空飞翔过.
但是,它与生俱来的本领就是使用星辰做向导.
在迁徙期间,在一个人造满天星的天空下放置一个鸟笼.
小鸟会跟着其他鸟类飞行的方向在大楼里飞.
虚构的星星只要转换方向,小鸟的飞行路线也跟着变换方向.
科学家认为,鸣鸟在白天飞行时,它们使用太阳作指引.
但是星星很显然是它们的重要导航.
但是当星星藏在云朵之后,它们又该怎么办呢?
显然,它们会通过一些地面的标志,比如山脉,海岸线和河流来找到它们的路.
但是如果因为太昏暗看不到这些标志,鸣鸟们会无助地盘旋,无法找到它们所在的位置.
（^00^） 希望可以帮到你哦.1年前查看全部
- 英语翻译题目是Migratory birds and coffee
dy53161年前1
-
装运ff车ii吧 共回答了17个问题
|采纳率100%已经发到你的邮箱,请查收1年前查看全部
- 这句话有没语病my winter was done,and I was like a migratory bird fl
这句话有没语病
my winter was done,and I was like a migratory bird flew across the sky,meeting the golden rays of the morning sun.hy_myangel1年前7 -
Chio 共回答了15个问题
|采纳率80%2个地方
flew - flying
meeting - met with 我觉得应该是被动,不是我主动去见,而是飞上天空遇见的
morning sun名词修饰名词作定语没问题1年前查看全部
- 帮忙看下语法有没有错误!在先等Time passes away like a migratory bird flying
帮忙看下语法有没有错误!在先等
Time passes away like a migratory bird flying south.The only difference is that it won't come back.Suddenly,I feel like an innocent child entering into school for the first time,but when I turned away from the memory,I realized it been a year since I entered into high school.The first time when I entered the school,I feel that this school is not pretty,yet it give me a strong felling of affinity.I don't think I must have a lot of friends except several intimate who share our joys and sorrows.My head teacher is a female,although she is very common but she has a strong affinity,.She is patient enough to teach us any problems that we cannot handle.I work as labor committee member in my class,though a little tired,but I enjoying doing it.I really love my high school life because it is full of boundless joy and I believe that I can do better in the future.贝贝111年前2 -
路灯下的水泥柱子 共回答了24个问题
|采纳率87.5%I realized it (加has) been a year since I entered into (加the)high school.the first time l entered the school,l feel(改为felt) that this school is not pretty还有,she is patient enough to teach…(改为enough patient)& 有了though就不该用but,though a little tired,l enjoy…1年前查看全部
大家在问
- 1为什么说鱼类是两栖类的祖先?
- 2请问在翻译英文书信时,”yours sincerely“对应的中文”你的真挚的“是顶格写,还是空两格?
- 3一平板车，质量M=100kg，停在水平路面上，车身的平板离地面的高度h=1.25m，一质量m=50kg的小物块置于车的平
- 4下列各种运动物体中能被视为质点的是（ ）
- 5英语句子中什么时候主语后用be几时用do几时直接加动词
- 6同主族元素形成的同一类型化合物，往往其结构和性质相似.PH4I是一种白色晶体，下列对PH4I的叙述中，正确的是（ ）
- 7如图为平面直角坐标系二象限内7x5的正方形网格,双曲线Y=K/X的一个分支经过
- 8下列有关细胞衰老和凋亡的说法，正确的是（ ）
- 90.20mol/LNaOH与0.20mol/L盐酸等体积混合后溶液PH?怎么酸?思路.混合后的溶液是什么?
- 10平面直角坐标系中,O为坐标原点,已知两点A（3,1）B（-1,3）若点C满足OC向量=aOA向量+rOB向量,
- 11某超市销售甲乙两种商品.甲商品进价10元,售价15元；乙商品每件进价30元,售价40元.
- 12英语翻译你该好好反省一下自己的所作所为.（high time）既来之,则安之.（now that）
- 13两捆铁丝长度比是7比4,甲捆用去18米,乙捆用去6米,剩下铁丝长度相等,原来各长多少米?
- 14英语翻译网名为"Sunny"的一名摄影师和网名为"Paul"的一名女服务员,于2007年6月12日在博客上举行了婚礼.博
- 1568乘69分之68等于 要 算是 快啊急