首页
登录
职称英语
Not all sounds made by animals serve as language, and we have only to turn t
Not all sounds made by animals serve as language, and we have only to turn t
游客
2024-02-15
51
管理
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. [br] The discovery of echolocation may help with all of the following EXCEPT______.
选项
A、measuring the depth of the sea
B、distinguishing different kinds of fish
C、bringing the invention of radar
D、varying the size and nature of an object
答案
C
解析
事实细节题。本题考查列举处,可用排除法解答。A、B、C在文中都有相关提及。D利用第2段中的varying制造干扰。在原文中,指的是回声因障碍物的不同而不同,而D偷换概念、曲解文意,D中的varying为及物动词.意为“改变”,显然不可能是回声定位的发现带来的功效。
转载请注明原文地址:https://tihaiku.com/zcyy/3454284.html
相关试题推荐
TheWebWaytoLearnaLanguageTheyoungwomanseatedne
TheWebWaytoLearnaLanguageTheyoungwomanseatedne
TheWebWaytoLearnaLanguageTheyoungwomanseatedne
TheWebWaytoLearnaLanguageTheyoungwomanseatedne
TheWebWaytoLearnaLanguageTheyoungwomanseatedne
Theseexcursionswillgiveyouaneverdeeper______intoourlanguageandcultu
Languagelearningbeginswithlistening.Individualchildrenvarygreatlyin
Languagelearningbeginswithlistening.Individualchildrenvarygreatlyin
【S1】[br]【S8】O本句是拿Achildtaughtasecondlanguageafterageten和a______作比较,并
【S1】[br]【S2】I所填词修饰languages,因此应为一形容词,选项中的形容词有potential,active,different,high和n
随机试题
()信息和技术()要闻[br]()语言课()评论H/I
AppleExpandsItsTouchy-feely(使人动心的)VisionThisweekend’sl
TheJapanesedoctorsfindoutthat______.[br]Theresearchfindingsbasedon_
Questions28-29Completethenotes,whichshowhowtheapproachestodefining’t
某社区拟针对辖区内糖尿病患者开展健康教育干预活动,制订了用药、饮食、运动、血糖监
下列选项中,()的评估结论是项目立项的依据。A:可行性研究报告 B:项目建议
《物业管理条例》规定业主在物业管理活动中享有的权利包括()A:参加业主大会会议,
套利定价理论的创始人是()。 A.斯蒂芬?罗斯B.詹森C.马柯威茨
在施工进度计划调整过程中,缩短某些工作的持续时间可采取的经济措施有()。A.增加
与沉浸式蛇管换热器相比,喷淋式蛇管换热器的主要优点是()。A.便于防腐
最新回复
(
0
)