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
2015-04-24
37
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; 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.
A snake is most aggressive when______.
选项
A、it meets a possible enemy
B、it is caught when it is sleeping or sloughing
C、it is disturbed unknowingly
D、it seeks a partner in the mating season
答案
D
解析
细节事实题。根据题干关键词aggressive定位到原文第二段。第二段首句就提到增加蛇的攻击性的因素有三个,但该句中的第二个分句中的peak表明在hunting for food or for mate的时候攻击性最强,与选项D对应。故答案为D。
转载请注明原文地址:https://jikaoti.com/ti/BQJYFFFM
0
考博英语
相关试题推荐
Americansuffersfromanoverdoseofwork【51】whotheyareorwhattheydo.Theyspend【52】timeatworkthanatanytimesinceWor
Mostpeoplewouldbe【71】bythehighqualityofmedicine【72】tomostAmericans.Thereisalotofspecialization,agreatdealof【
Mostpeoplewouldbe【71】bythehighqualityofmedicine【72】tomostAmericans.Thereisalotofspecialization,agreatdealof【
Therearethreeseparatesourcesofhazard【C1】______totheuseofnuclearreactiontosupplyuswithenergy.Firstly,theradioa
Anewbiotechnologyprocedurethatcouldbecomecommerciallyavailableinaslittleastwotofouryearsis"transgenosis",whic
BeforehighschoolteacherKimberlyRughgotdowntobusinessatthestartofarecentschoolweek,shejokedwithherstudents
BeforehighschoolteacherKimberlyRughgotdowntobusinessatthestartofarecentschoolweek,shejokedwithherstudents
Language,culture,andpersonalitymaybeconsidered______ofeachotherinthought,buttheyareinseparableinfact.
Therehasbeenalotofhand-wringingoverthedeathofElizabethSteinberg.Withoutblaminganyoneinparticular,neighbors,fr
随机试题
将作业部分或全部移到外存,以调入其他的作业的技术称为_______。
要增加窗体页眉和窗体页脚,则选择“视图”菜单中的______命令。
邓小平在关于社会主义本质的论述中指出,社会主义的最终目标是()
患儿,7个月。发热、咳嗽3天入院。诊断为支气管肺炎。入院后3小时,突然烦躁不安,呼吸困难,口周发绀,查体:呼吸60次/分。脉搏181次/分,心音低钝,双肺细湿啰音密集,肝肋下3.5cm,可能发生了
如果C村村委会对B乡政府的行为不服,可以寻求哪些法律救济途径?如果C村村委会申请行政复议,应当以哪个机关为复议机关?
工程咨询方法体系按照方法应用领域分类中的通用方法主要有()。
某施工单位承接了一段二级道路施工,其中包括3道结构形式和工程量基本相同的涵洞。根据工期要求,对于3道涵洞施工要求组织几个相同的工作队,在同一时间、不同的空间上进行施工。按照资源计划的要求,施工涵洞时安排的技术工人主要有测量工、机修工、钢筋工、木工、混凝
DOS的目录采用的是()。
党的十九大报告指出,到(),基本实现现代化,把我国建成社会主义现代化国家。
1,2,5,14,41,()
最新回复
(
0
)