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
专升本
We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain ti
We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain ti
admin
2017-10-30
55
问题
We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons; most of them move to find food more easily, but others move to get away from places that are too crowded.
When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁移)is probably the migration of the fish, which is called "salmon". This fish is bom in fresh water but it travels many miles to salt water. There it spends its life. When it is cold, it returns to its birthplace in fresh water. Then it gives birth and dies there. In Northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move to the seaside and many of them are killed when they fall into the sea.
Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of the bad weather arrives, the lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.
So, sometimes we know why humans and animals move from one place to another, but at other times we don’ t. Maybe living things just like to travel.
The reason why the lobsters migrate is______.
选项
A、the bad weather
B、the depth of the ocean
C、scientists’ lack of interest
D、unknown
答案
D
解析
事实细节题。根据文章第三段最后一句“Nobody knows why they do this,and nobody knows where they go.”可知,没有人知道龙虾为什么要迁徙,要迁往 何处。因此选D项。
转载请注明原文地址:https://kaotiyun.com/show/QbWC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Theproducersofinstantcoffeefoundtheirproductstronglyresistedinthemarketplacesdespitetheirproduct’sobviousadva
Heisalreadyinthebathsodonot______himtoanswerthephone.
ProfessorTaylor’stalkhasindicatedthatsciencehasaverystrong______ontheeverydaylifeofnon-scientistsaswellasscie
______energyundertheearthmustbereleasedinoneformoranother,forexample,anearthquake.
There()somemistakesinyourcomposition.
I’vebeenwritingformostofmylife.ThebookWritingWithoutTeachersintroducedmetoonedistinctionandonepracticethat
Mostepisodesofabsent-mindedness-forgettingwhereyouleftsomethingorwonderingwhyyoujustenteredaroom—arecausedbya
Havingnomoneybut______toknow,hesimplysaidhewouldgowithoutdinner.
—DoyouknowanythingabouttheTradeUnionDinner?—Yes,we______anofficialinvitation.
WhenIwasstudyingEnglishatatrainingcenterinWashingtonD.C.in1998,IsharedahousewithtwoyoungAmericans,JimandS
随机试题
女性,24岁,盆腔B超发现右附件囊实性肿物7cm×5cm。手术切除肿物,病理组织学检查:镜下可见成熟的皮肤、毛囊、汗腺、脂肪、软骨、纤毛柱状上皮。符合本病的诊断是
A.慢性浅表性胃炎B.十二指肠球部溃疡C.胃食管反流病D.胃癌E.胆汁反流性胃炎男性,70岁,上腹胀满,无规律疼痛,伴嗳气,纳差,乏力,消瘦,大便发黑
铜绿假单胞菌(绿脓杆菌)感染宜选用( )。
旅游团抵达接站地点后,地陪首先应向全陪和领队核实人数。()
下列关于村民委员会选举原则的说法,正确的是()。
活动课程又称()
Sincethe1960s,CanadaandtheUnitedStateshavebecomemoreculturallydiversethanatanyothertimeintheirhistory.In19
画龙点睛致使两龙破壁腾空而去的传说是人们对__________的画龙艺术的赞誉。
WiththeMetOfficepredictingasummerheatwave,MacmillanCancerReliefthisweek(1)_____itscustomarywarningaboutthesun
在众多的服务器中,(53)是最为重要的服务器。
最新回复
(
0
)