首页
登录
职称英语
Naturally, in a group of animals as diverse as the snakes, and with so many
Naturally, in a group of animals as diverse as the snakes, and with so many
游客
2024-04-13
21
管理
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. [br] The author uses the example in the last paragraph to support his idea that _____.
选项
A、snakes do not begin the aggressive act if it is not disturbed
B、some snakes are more aggressive and more ready to attack
C、it is hard to forecast whether and how snakes would attack
D、snakes often conceal themselves as their principal defense
答案
C
解析
第3段开头就有for example这个标志性的词组,表明这一句是为了支持上文的例子。结合第2段末句可知,第3段是为了证明其不可预测性的,故C正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3554014.html
相关试题推荐
[originaltext]Somedesertanimalscansurvivetheverystrongsummerheata
观众不仅能欣赏到各种令人垂涎欲滴的食物,而且还能了解到各种菜肴精致的制作过程。Audiencescannotonlyenjoydiversemout
Naturally,inagroupofanimalsasdiverseasthesnakes,andwithsomany
Biologically,thereisonlyonequalitywhichdistinguishesusfromanimals:
Biologically,thereisonlyonequalitywhichdistinguishesusfromanimals:
Tenyearsago,JoeAllenbeganstudyingadiversegroupofseventhgradersn
Tenyearsago,JoeAllenbeganstudyingadiversegroupofseventhgradersn
Tenyearsago,JoeAllenbeganstudyingadiversegroupofseventhgradersn
Tenyearsago,JoeAllenbeganstudyingadiversegroupofseventhgradersn
Tenyearsago,JoeAllenbeganstudyingadiversegroupofseventhgradersn
随机试题
DespiteDenmark’smanifestvirtues,Danesnevertalkabouthowproudtheyare
Itseemsindividualcancercellssendoutthesamedistresssignalsaswound
反复大量输注血小板的患者,产生血小板同种抗体的比例为( )。A.50% B.
患者,女性,36岁,因乳腺癌住院,准备手术治疗,患者焦虑,常暗自流泪,沉思。护士
衣原体和病毒的共同特征是A:含两类核酸B:专性活细胞内寄生C:独特的发育周期
A.D级 B.A级 C.X级 D.B级 E.C级动物或人的研究表明它可以
设随机变量X服从自由度为2的t分布,则P{X≥λ}=0.05中λ的值是:A
以下关于中国证券交易市场建立过程的叙述中,正确的有()。A:1986年8月,上海
根据以下资料,回答61-65题: 2006年末,浙江省拥有人才资源数379.5
某水利工程经监理工程师批准的施工网络进度计划如下图所示(单位:天)。 合同
最新回复
(
0
)