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
Naturally, in a group of animals as diverse as the snakes, and with so many varied enemies, there are numerous defensive reactio
Naturally, in a group of animals as diverse as the snakes, and with so many varied enemies, there are numerous defensive reactio
admin
2018-08-25
26
问题
Naturally, in a group of animals as diverse as the snakes, and with so many varied enemies, there are numerous defensive reactions and devices. There is, however, one general pattern of behavior. In the presence of suspected enemy the first reaction is to try to escape observation; if this fails, the next resort is the flight to some inaccessible retreat, but if this is not possible, or is circumvented, various kinds of intimidatory gestures and warning devices are brought into play; in the last resort the snake attacks. This pattern varies with the circumstances; some stages may be omitted or combined unpredictably whilst all some notoriously irascible species may dispense with all the preliminaries and attack almost at once, though seldom or never without some provocation.
Amongst the factors that increase aggressiveness are hunger, the mating season and surprise, with the last mentioned the commonest; when hunting for food or for mate, activity and the aggressive instinct are both at their peak. Owing to their poor sense of hearing snakes are very liable to be, quite literally, caught napping and a similar situation arises during their periods of temporary blindness just before sloughing(蜕皮)begins. By far the greatest number of snake-bit accidents result from the unwitting disturbance of resting snakes, and this hazard is much increased with species that are well disguised and whose natural instinct is to trust to this concealment as their principal defense. As well as differences in aggressiveness between individuals of the same species according to the circumstances and conditions, there are also notable differences between species, even closely allied species; and the reports of those who have been attacked may understandably be lacking in objectivity. So it is impossible to forecast, even in outline, how any encounter will develop.
The Hamadryad, for example, is usually credited with being amongst the most aggressive of snakes, and there are many accounts of unprovoked attacks, yet on one occasion fourteen men and seven dogs passed and returned within two yards from a nest and no snake was seen although the female, which guards the nest, could not have been far away.
When a snake meets a potential enemy, its primary device is _____.
选项
A、avoiding any observation
B、finding a safe shelter
C、giving a warning threat
D、starting a quick attack
答案
A
解析
首段第3句提到了蛇遇到可疑敌人时的行为模式:首先躲开对方的监视,第二步是寻找安全藏身处,第三是向对方发出警告,最后实施攻击,因此选项A为本题答案。选项B、C和D分别是对第二、第三和最后一步的近义替换,因此都不是正确答案。
转载请注明原文地址:https://kaotiyun.com/show/NBH7777K
0
大学英语六级
相关试题推荐
EdgarPoe,anAmericanwriter,wasbornin1809.Hisparentswereactors.Edgarwasababywhenhisfatherleftthefamily.Hew
EdgarPoe,anAmericanwriter,wasbornin1809.Hisparentswereactors.Edgarwasababywhenhisfatherleftthefamily.Hew
EdgarPoe,anAmericanwriter,wasbornin1809.Hisparentswereactors.Edgarwasababywhenhisfatherleftthefamily.Hew
Itbeganwithsomemarshmallows(棉花软糖).Inthe1960sWalterMischel,apsychologistthenworkingatStanfordUniversity,started
Self-publishing[A]Toawriter,self-publishingisanincrediblypowerfulandalluringconcept.Onthesimplestlevel,it’sani
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’twanttoburn.Butformarineanimalslikewhales,t
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
Indepartmentstoresandclosetsallovertheworld,theyarewaiting.Theiroutwardappearanceseemsratherappealingbecauset
ThecityfinallywonapprovalforalimitedspeedcameraprograminJuneafteralongbattleinAlbany,andCityMayorBloomberg
随机试题
建立和健全班级组织的规范体系,是组织和培养班集体的重要一环。根据班级规范的内容和作用对象,可把班级规范大体上分为()。
不得办理托收承付结算的业务包括()。
根据《与贸易有关的知识产权协议》的规定,下列说法哪些是正确的?
概念是指符号所代表的具有共同标准属性的对象、事件、情境或性质是___________对概念的界定。
“依据生物在生态系统中的不同作用,一般可分为生产者、消费者和分解者”,这一重要概念属于的一级主题是()。
“三个代表”这一科学理论在建设中国特色社会主义的思想路线、发展道路、发展阶段和发展战略、根本任务、发展动力、依靠力量、国际战略、领导力量和根本目的等重大问题上取得了丰硕成果,用一系列紧密联系、相互贯通的新思想、新观点、新论断,创造性地回答了()。
习近平总书记在省部级主要领导干部学习贯彻十八届五中全会精神专题研讨班上发表讲话。在讲话中,习近平总书记就深入认识经济发展新常态、深入理解新发展理念、供给侧结构性改革等发表看法,把握经济发展新常态,要注意克服儿种倾向,下列说法正确的是()。
悲剧成为审美对象只能以文字艺术的形式出现,原因在于它需要建立悲剧事件与人的心理距离。不仅遥远的时间会使过去的现实悲剧的悲惨因素淡化,就是很近的时间间隔也可以使人陷入现实。这里还有一个空间的间隔,悲剧艺术展现的毕竟是一个人们不熟悉或有点陌生的空间,这就使人们
数据字典(DD)所定义的对象都包含于()。
A、Heisnotfollowingthecompleterecipe.B、Heismissingtherightpantocookthepizza.C、Heisusingthedirectionsforad
最新回复
(
0
)