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
64
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
TomostAfricans,tribalismsimplymeansverystrongloyaltytoone’sethnicgroup.Itisaforcethatcanbebothgoodandbad
Forthispart,you’rerequiredtowriteacompositiononthetopicLivingaloneorLivingwithRoommates.Youshouldwriteatl
Bubonicplaguebrokeout______theorganismbeingconveyedfromoneindividualtoanotherbylice.
Thesearebooksandnewspapers()youaskedyesterday.
There()somemistakesinyourcomposition.
Thoseopinionsarenowoutof().
I’vebeenwritingformostofmylife.ThebookWritingWithoutTeachersintroducedmetoonedistinctionandonepracticethat
Ipromisedtolook______thematterassoonasIgotthere.
Alotofmoneyintheshopwasstolenyesterdaywhentheelectricitywassuddenlycutoff.
随机试题
请编写一个函数intCount(doublea[],intn),统计出具有n个元素的一维数组中大于等于所有元素平均值的元素个数并返回这个值。注意:请使用for循环实现该函数。注意:部分源程序已存在文件test12_2.cpp中。请勿修
什么是化学工业?化工生产的特点是什么?
患儿,男,8岁,眼睑水肿4天伴尿少,近2日尿呈浓茶色,患儿无尿频、尿急、尿痛。患儿3周前曾患上呼吸道感染。查体:T36.2℃,R26次/分,P100次/分,BP130/90mmHg,神清,双眼睑及颜面水肿,双足背轻度非凹陷性水肿,心肺(一),腹软,
【2001年第42题】如图3-385所示的梁的剪力图形式,哪个正确?
某4S店本月进口9辆商务车(非新能源或节约能源车辆),海关核定的关税完税价格为40万元/辆,本月已经销售4辆,3辆仍放置在展厅待售,2辆本店自用。已知商务车适用关税税率为25%,消费税税率为12%。有关本月该4S店应缴纳的车辆购置税,下列计算正确的是(
大西洋奴隶贸易
20世纪50年代,美国心理学家史蒂文斯用()研究了刺激强度与感觉大小的关系。
December25thisChristmasDay.ManyAmericansarebusywithChristmasandthewinterholidayseason.BuyingaChristmastreeis
Iwalkedoutofthecinema,______toreturntoseethewonderfulfilmthenextSunday.
不徇私情之秘加拿大总理之养子犯法,法院秉公判决,不徇私情,加国总理亦大义灭亲,绝不施加任何影响,全由法院做主。消息传出,某市老干部议论纷纷,皆以为他山之石可以攻玉也。偏一现职干部妙语惊人:“人家是资本主义国家。儿子成年后即独立生活,无赡养父母
最新回复
(
0
)