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
It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is
It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is
admin
2010-01-15
35
问题
It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is now listed as an endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior.
So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of underwater listening devices spanning the oceans.
Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies.
Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption for the first time and that they plan similar studies.
Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures.
The speed of sound in water is roughly one mile a second--slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope does when it carries faint noise from a patient’ s chest to a doctor’ s ear. This focusing is the main reason why even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thou- sands of miles.
It can be inferred from the passage that ______.
选项
A、new radio devices should be developed for tracking the endangered blue whales
B、blue whales are no longer endangered with the use of the new listening system
C、opinions differ as to whether civilian scientists should be allowed to use military technology
D、military technology has great potential in civilian use
答案
D
解析
从“tracking whales”到"monitoring a deep-sea volcanic eruption”再到"tracking ocean currents and measuring changes in ocean and global temperatures",所有这些都是军用技术转民用的例子,由此我们可以看出,这种技术“in civilian use”上的巨大潜力,因此,D 为正确答案。
转载请注明原文地址:https://jikaoti.com/ti/HybMFFFM
0
专业英语四级
相关试题推荐
(1)Thishasbeenquiteaweekforliterarycoups.Inanalmostentirelyunexpectedmove,theSwedishAcademyhavethislunchtim
(1)Thishasbeenquiteaweekforliterarycoups.Inanalmostentirelyunexpectedmove,theSwedishAcademyhavethislunchtim
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
A、Theenvironment.B、Academicwork.C、Commercialization.D、Localhistory.A细节归纳题。女士说,回到哈佛当老师与她在哈佛上学对她而言是两个不同的时期。重回哈佛,她觉得学校更加商业化,
随机试题
妇女进入老年期后的生理特点不正确的是( )。
3岁患儿,面容愚笨呆板,眼距宽,鼻粱平,舌厚肥大常伸出口外,怕冷,少动,智力低下,腕骨有1个骨化中心。该患儿的正确处理是
建设项目信息管理的()原则要求在建设项目的实施过程中对有关信息的分类进行统一,对信息流程进行规范。
《特种设备安全监察条例》规定,特种设备的安装、改造、重大维修过程,必须经检验检测机构按照()的要求进行监督检验,未经监督检验合格的不得出厂或者交付使用。
台湾最大的瀑布是蛟龙瀑布。()
2005年1月30日,新华社播发《中共中央国务院关于进一步加强农村工作提高农业综合生产能力若干政策的意见》,其主要内容包括
Aconsiderableamountoftimeandmoneyhasbeeninvestedin_____thissystem.
Completethenotesbelow.WriteNOMORETHANTWOWORDSAND/ORANUMBERforeachanswer.BirminghamExhibitionExampleAnswerPur
Asthegoodsyouorderedarenowinstock,wewillshipthemwithout______asearlyaspossible.
A、Gettingrichquickly.B、Distinguishingoneself.C、Respectingindividualrights.D、Doingcredittoone’scommunity.B录音结尾提到,大部分
最新回复
(
0
)