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
A、To measure the movement of waves in the ocean. B、To determine whether the Earth’s temperature is going up. C、To study the beha
A、To measure the movement of waves in the ocean. B、To determine whether the Earth’s temperature is going up. C、To study the beha
admin
2013-11-21
49
问题
A team of scientists recently began a project to measure the effects of loud noises on sea animals. If the sounds don’t harm the animals, then the researchers can go ahead with a plan to transmit sound waves through the Pacific Ocean to take the earth’s temperature. Sound travels faster through warm water than cold water. By analyzing the speed of sound through the ocean over, the scientists will be able to determine if our planet is warming up. The experiment was nearly cancelled more than a year ago because environmental groups fear that the sound will harm the sea animals. So, scientists are conducting tests on the animals first. The researchers lowered a loud speaker that emit low frequency sound about 1,000 meters beneath the ocean. Scientists at the site transmit sound waves into the ocean. Radio transmitters attached to some of the sea animals help the researchers keep track of the animals’ movements. If the sea animals are distressed by the sounds, they would swim away from the speakers. So far, there aren’t any signs that the animals are being harmed. Researchers at the site noticed that large numbers of sea animals swim near the speaker whether it was turned on or off, but it is still too soon to know for sure, the scientists admit.
Questions 16 to 18 are based on the passage you have just heard.
16. What is the purpose of analyzing the speed of sound through the Pacific Ocean?
17. For what purpose were radio transmitters used?
18. What was the reaction of the sea animals to the sound tests?
选项
A、To measure the movement of waves in the ocean.
B、To determine whether the Earth’s temperature is going up.
C、To study the behavior of some sea animals.
D、To measure the depths of the ocean.
答案
B
解析
细节题。根据“By analyzing the speed of sound through the ocean over,the scientists will be able to determine if our planet is warming up.”可知通过分析声音通过海洋的速度,科学家能够发现地球是否变暖。故选项B符合题意。
转载请注明原文地址:https://kaotiyun.com/show/cfS7777K
0
大学英语四级
相关试题推荐
Itisnotsurprisingthataphilosophyborrowedfrombusinessshouldseeitsprincipalfocuswithineducationasthefurthering
A、Toobservepeople’sattitudetowardsstrangers.B、Toseehowpeoplegetalongwiththeirfriends.C、Totestpeople’sbehavior
Thereisnodenyingthatstudentsshouldlearnsomethingabouthowcomputerswork,justasweexpectthematleasttounderstan
A、Ashopassistant.B、Alibrarian.C、Asecretary.D、Ateacher.B女士话里包含了关键特征词book,thereserveroom,thereservelibrarian,intheli
A、Thebusstation.B、Theschool.C、Theairport.D、Thetravelagency.C女士说:“我想你最好乘坐机场快线。”机场快线是连接机场与市中心的专车,因此男士应该是去机场,选C。
A、Hecannotreturnthemoneyrightnow.B、Hecanreturnthemoneytoday.C、Hecannotreturnthemoneythismonth.D、Hewantsto
Weallmakepromisesinourdailyinteractionswithothers.Onthe【C1】_____hand,promisessuchas"I’llreturnyourbooknextwe
Ithasbeenproventhatshortburstsofconcentrationrepeatedfrequentlyaremuchmore【B1】______thanonelongperiod.So,even
A、ThetwokindsofDirectors.B、ThetasksoftheBoardofDirectors.C、Howthecompanyisorganized.D、Howtorunacompany.C选项
随机试题
A.血细胞破坏过多B.造血物质缺乏C.两者均有D.两者均无缺铁性贫血
使用无菌手套的错误方法是
A、消除B、肠肝循环C、生物转化D、生物等效性E、酶诱导作用某些药物可使体内药酶活性、数量升高
女性,20岁。1月前患扁桃体炎,心悸,反复晕厥3天,查体:双肺呼吸音正常,心率46次/min,律齐,各瓣膜听诊区未闻及杂音,双下肢不肿,心电图示:Ⅲ度房室传导阻滞。根本的治疗应是
在波的传播方向上,有相距为3m的两质元,两者的相位差为,若波的周期为4s,则此波的波长和波速分别为()。
出口人开具的汇票如遭拒付,则()。
甲、乙、丙3人从星期一开始工作,甲每工作3天就休息1天,乙每工作5天就休息2天,丙每工作7天就休息3天,那么三人第一次同时休息是在星期几?
用重测法估计信度,最适宜的时距是随测验的目的、性质和被试者的特点而异,一般是______周较宜,间隔时间最好不超过______个月。()
Whydidthemanborrowthewoman’scomputerlasttime?
(1)PeterBenchley,65,theauthorandconservationistwhowroteJaws,theshark-attacknovelthatbecameaclassicmovieandpro
最新回复
(
0
)