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
Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echolocation (回声定位
Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echolocation (回声定位
admin
2023-03-20
34
问题
Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echolocation (回声定位) in bats to see a case in which the voice plays a strictly practical role.
To get a full appreciation of what this means we must turn first to some recent human inventions. Everyone knows that if he shouts near a wall or a mountainside, an echo will come back. The further off this solid obstacle, the longer time it will take for the return of the echo. A sound made by tapping on the main body of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps and the receipt of the echoes the depth of the sea at that point can be calculated. So was born the echo-sounding equipment, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish. With experience, and with improved equipment, it is now possible not only to locate fish but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.
A few years ago it was found that certain bats emit squeaks (吱吱声) and by receiving the echoes they could locate and steer clear of obstacles—or locate flying insects on which they feed. This echolocation in bats is often compared with radar, the principle of which is similar.
As it is discussed in the passage, the squeaks of bats can be functionally compared with
选项
A、human languages
B、a mountainside
C、a shoal of fish
D、taps on a ship
答案
D
解析
推理判断题。根据最后一段可知,蝙蝠发出吱吱声可以探测障碍物的距离,而第2段也指出轻敲船体可测知海底的距离,因此在功能上,选项D与蝙蝠的吱吱声相同。选项A中的human languages在文中尚未提到。选项B和C在文中各自的例子中充当的都是障碍物的角色,因此都不正确。
转载请注明原文地址:https://kaotiyun.com/show/zQqD777K
0
大学英语四级
相关试题推荐
Languagepervadessociallife.Itistheprincipalvehicleforthetransmissionofculturalknowledge,andtheprimarymeansby
Languagepervadessociallife.Itistheprincipalvehicleforthetransmissionofculturalknowledge,andtheprimarymeansby
Thatlargeanimalsrequireluxuriantvegetationhasbeenageneralassumptionwhichhaspassedfromoneworktoanother;butI
Thatlargeanimalsrequireluxuriantvegetationhasbeenageneralassumptionwhichhaspassedfromoneworktoanother;butI
Thatlargeanimalsrequireluxuriantvegetationhasbeenageneralassumptionwhichhaspassedfromoneworktoanother;butI
PASSAGEONEUseadjectivestodescribeBuck’sphysicalappearanceandpersonality.YoushouldwriteatleastTWOadjectivesf
PassageFourAccordingtoFrancesO’Grady,whatshouldahealthymoderneconomybelike?
Asmoreandmorepeopletravel,workorstudyabroad,moreattentionhasbeenpaidtohowtotreatculturaldifferences.Should
Iftelevisionprogramsdidnotfeaturecriminals,they________resultinincreasedviolenceinsociety.
随机试题
应用市场法评估土地使用权进行交易情况修正时,应修正的因素是()
A、Na+B、K+C、Ca2+D、Cl-E、HCO3-神经细胞膜在静息时通透性最大的离子是
在对象选择中,通过对每个部件与其他各部件的功能重要程度进行逐一对比打分,相对重要的得1分,不重要的得0分,此方法称为()。
设由方程exy+x+y=1确定隐函数y=y(x),则=( )。
期权的权利期间与期权的时间价值存在()的影响。
_________是确定我国教育目的的理论基础。
五十多年后回顾这段历史,杜老依然________,然而他也没有________土改实施过程中的缺陷,例如消灭富农和侵犯中农,以及没有严格依法保护劳动者财产利益。依次填入划横线部分最恰当的一项是()。
_______是以太网技术的典型特征。
以下是某商场的购物记录集合,每个购物篮中包含若干商品。现在要基于该数据集进行关联规则挖掘,如果设置最小支持度为60%,最小置信度为80%,则在以下列出的关联规则中,符合条件的是()。
NewresearchfromtheUnitedStatessuggeststhatthemillennia-oldtherapyofyogacouldbenefitmillionsofpeoplewhosuffe
最新回复
(
0
)