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
Spacing in Animals Flight Distance Any observant person has noticed that a wild animal will allow a man or other potential enemy
Spacing in Animals Flight Distance Any observant person has noticed that a wild animal will allow a man or other potential enemy
admin
2009-06-15
50
问题
Spacing in Animals
Flight Distance
Any observant person has noticed that a wild animal will allow a man or other potential enemy to approach only up to a given distance before it flees. "Flight distance" is the terms used for this interspecies spacing. As a general rule, there is a positive relationship between the size of an animal and its flight distance — the larger the animal, the greater the distance it must keep between itself and the enemy. An antelope will flee when the enemy is as much as five hundred yards away. The wall lizard’s flight distance, on the other hand is about six feet. Flight is the basic means of survival for mobile creatures.
Critical Distance
Critical distance apparently is present wherever and whenever there is a flight reaction. "Critical distance" includes the narrow zone separating flight distance from attack distance. A lion in a zoo will flee from an approaching man until it meets a barrier that it cannot overcome. If the man continues the approach, he soon penetrates the lion’s critical distance, at which point the cornered lion reverses direction and begins slowly to stalk the man.
Social Distance
Social animals need to stay in touch with each other. Loss of contact with the group can be fatal for a variety of reasons including exposure to enemies. Social distance is not simply the distance at which an animal will lose contact with his group — that is, the distance at which it can no longer see, hear, or smell the group — it is rather a psychological distance, one at which the animal apparently begins to feel anxious when he exceeds its limits. We can think of it as a hidden band that contains the group.
Social distance varies from species to species. It is quite short — apparently only a few yards — among some animals, and quite long among others.
Social distance is not always rigidly fixed but is determined in part by the situation. When the young of apes and humans are mobile but not yet under control of the mother’s voice, social distance may be the length of her reach. This is readily observed among the baboons in a zoo. When the baby approaches a certain point, the mother reaches out to seize the end of its tail and pull it back to her. When added control is needed because of danger, social distance shrinks. To show this in man, one has only to watch a family with a number of small children holding hands as they cross a busy street.
选项
A、Distance between animals of the same species before fleeing.
B、Distance between large and small animals before fleeing.
C、Distance between an animal and its enemy before fleeing.
D、Distance between certain animal species before fleeing.
答案
C
解析
此选项最符合原文对flight distance下的定义。
转载请注明原文地址:https://kaotiyun.com/show/PHGd777K
本试题收录于:
职称英语综合类基础题库职称英语分类
0
职称英语综合类基础
职称英语
相关试题推荐
HeartbeatofAmericaNewYork—theStatueofLiberty,theskyscrapers,thebeautifulshopsonFifthAvenueandthemanytheat
HighwaysintheUSTheUnitedStatesiswell-knownforitsnetworkofmajorhighwaysdesignedtohelpadrivergetfromone
ManandComputerWhatmakespeopledifferentfromcomputerprograms?Whatisthemissingelementthatourtheoriesdon’tyet
AnIntelligentCarDrivingneedssharpeyes,keenears,quickbrain,andcoordination(协调)betweenhandsandthebrain.Many
Theyhadafarbetteryieldthananyotherfarmmilesawayaroundthisyear.
DuringanearthquakeinChinain1975,morecowshad,’earthquakenerves"andsomeremainedcalm.Animalsofthesamekindalwa
ThepeopleofKiribatiworrythatonedaytheircountrywillbetakenawaybyasuddenhightide.Thecoralislandnationsoft
CaribbeanIslandsWhatwouldyouseeifyoutookacruisetotheCaribbeanIslands?Palmtreesandcoconuts(椰子)?Whitebeaches
LightNight,DarkStarsThousandsofpeoplearoundtheglobestepoutsidetogazeattheirnightsky.Onaclearnight,with
1.Itwashardtosaywhythemandeservedsuchshabbytreatment.
随机试题
三相负载接收的总有功功率,等于每相负载接收的有功功率之和。()
设z=z(x,y)由x2+y2+z2-4z=0确定,则出=________.设方程xy+xz+yz=0所确定的隐函数为z=z(x,y),则=________.
关于门静脉高压症的病理生理变化中,下列哪一项是错误的
缺氧患者最典型的症状是
下列疾病可不严格限制植物蛋白的摄入,哪项除外
下列权利中,属于身份权的是()。
费用可表现为资产的减少或负债的增加。()
旅行社不正当竞争的情形有哪些?
人民代表大会制度在根本上体现的是()
Soviet’sNewWorkingWeekHistorianinvestigateshowStalinchangedthecalendartokeeptheSovietpeoplecontinuallyatwork.
最新回复
(
0
)