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
30
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://kaotiyun.com/show/PcLO777K
0
考博英语
相关试题推荐
Americansuffersfromanoverdoseofwork【51】whotheyareorwhattheydo.Theyspend【52】timeatworkthanatanytimesinceWor
Seariseasaconsequenceofglobalwarmingwouldimmediatelythreatenthatlargefractionoftheglobelivingatsealevel.Nea
ModernlorehasitthatinEnglanddeathisimminent,inCanadainevitableandinCaliforniaoptional.Smallwonder.Americans’
Whatissospecialaboutintuitivetalent?Extensiveresearchonbrainskillsindicatesthatthosewhoscoreashighlyintuitive
Iftheprofitsinoneyeararenotsufficienttopaythedividend,the______willbepaidfromtheprofitsoflateryear.
Everygeologistisfamiliarwiththeerosioncycle.Nosoonerhasanareaoflandbeenraisedalivesea-levelthanitbecomess
Therearethreeseparatesourcesofhazard【C1】______totheuseofnuclearreactiontosupplyuswithenergy.Firstly,theradioa
Therearethreeseparatesourcesofhazard【C1】______totheuseofnuclearreactiontosupplyuswithenergy.Firstly,theradioa
Despiteeffortstoprovidethemwithalternativessuchastheshelter,womenfrequentlyandrepeatedlyreturnedtoviolentanda
Smallbusinessownersmustaccepttheburdensofentrepreneurship.Beinginbusinessforyour-selfrequiresyourfullattention
随机试题
Justbecausetheycan’tsingoperaorrideabicycledoesn’tmeanthatanimalsdon’thaveculture.There’snobetterexampleof
通常稳定电压为()V的稳压管的温度稳定性较好。
军团菌肺炎首选抗菌药物是()
A.流行性感冒病毒B.腺病毒C.鼻病毒D.链球菌E.柯萨奇病毒流感病原体
撰写“医家五戒十要”的医家是
溶栓治疗者,阿司匹林等抗血小板药物应在溶栓多长时间后使用()。
2010年2月,崔某与同事李某因口角发生纠纷,崔某将李某的胳膊、肩、背、眼多处打伤,除左眼视力每况愈下外,其他损伤经住院治疗均已治愈。李某为此向人民法院提起自诉,人民法院予以受理。经审查,法院认为李某左眼可能致残,被告人可能被判处3年以上有期徒刑的刑罚,遂
某企业为增值税一般纳税人,适用的增值税税率为16%。2018年12月1日,该企业“原材料一甲材料”科目期初结存数量为2000千克,单位成本为15元,未计提存货跌价准备。12月份发生有关原材料收发业务或事项如下:(1)10日,购入甲材料2020千克
我国享有国家立法提案权的国家机关包括
Duringthesummervacation,kidsareoftenseenhanging______inthestreets.(2010-67)
最新回复
(
0
)