首页
登录
职称英语
Why would an animal kill itself? It seems a strange question, and yet it is
Why would an animal kill itself? It seems a strange question, and yet it is
游客
2023-08-21
24
管理
问题
Why would an animal kill itself? It seems a strange question, and yet it is one that has【B1】______some people for a long time. The lemming (旅鼠) is one such animal. Lemmings periodically commit mass【B2】______, and no one knows just why!
The small【B3】______, which inhabit the Scandinavian mountains, sustain themselves on a diet of roots and live in nests they make underground. When their food supply is【B4】______large, the lemmings live a normal, undisturbed life.
However, when the lemmings’ food supply becomes too low to support the population, a singular【B5】______commences. The lemmings leave their nests all together at the same time, forming huge crowds. Great numbers of the lemmings begin a long and hard journey across the Scandinavian plains, a journey that may last weeks. The lemmings eat everything in their path, continuing their【B6】______march until they reach the sea.
The reason for what follows remains a mystery for zoologists and naturalists. Upon reaching the coast, the lemmings do not stop but swim by the thousands into the surf. Most【B7】______only a short time before they tire, sink, and drown.
A common theory for this unusual phenomenon is that the lemmings do not realize that the ocean is such【B8】______water. In their cross-country journey, the animals must traverse many smaller bodies of water, such as rivers and small lakes. They may【B9】______that the sea is just another such swimmable【B10】______. But no final answer has been found to the mystery. [br] 【B5】
选项
答案
migration
解析
此空的前面是冠词+形容词:a regular,因此需要填入一个名词;后面是第三人称单数形式的动词commences,有“开始”之意,进而确定此空的名词为单数。migration意为“迁徙,移居”。
转载请注明原文地址:https://tihaiku.com/zcyy/2945052.html
相关试题推荐
[originaltext]W:Hey,Sunny,Iwouldliketoaskafewquestionsaboutmarriage
[originaltext]W:Hey,Sunny,Iwouldliketoaskafewquestionsaboutmarriage
[originaltext]W:Todd,I’dliketoaskyousomequestionsaboutELLLO.Howlong
[originaltext]Somedesertanimalscansurvivetheverystrongsummerheata
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumans
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumans
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumans
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumans
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumans
Researchonanimalintelligencealwaysmakesuswonderjusthowsmarthumans
随机试题
Theoceanbottom—aregionnearly2.5timesgreaterthanthetotallandareaof
Itistimethatyou(go)______toschooltoattendthelectureaboutsocialabil
与悬浮-密实结构的沥青混合料相比,关于骨架-空隙结构的黏聚力和内摩擦角的说法,正
下列选项中属于招标人与投标人串通投标的情形是()。A.招标人授意投标人撤销、
下列人员需在招股说明书上签字的是( )A.董事 B.监事 C.董事会秘书
某资产A、,如果2018年我国经济上行其年化收益率预计为15%,经济平稳年化收益
耳屏前,下颌骨髁状突后缘的腧穴是A:下关 B:听宫 C:听会 D:耳门
(2018年真题)理财师的工作流程六个步骤依次是()。 (1)执行理财规
下列项目的资源税可采用从价计征或从量计征的方式的有()。A.地热 B.砂石
(2017年真题)在事故抢险救援过程中,个人劳动防护用品是保护人身安全的重要手段
最新回复
(
0
)