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、They were frightened and distressed. B、They swam away when the speaker was turned on. C、They swam closer to "examine" the spea
A、They were frightened and distressed. B、They swam away when the speaker was turned on. C、They swam closer to "examine" the spea
admin
2014-04-30
13
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 a time, 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 feared that the sound would confuse or harm the sea animals. So, scientists are conducting tests on the animals first. The researchers lowered a loud speaker that emits low frequency sound about 1000 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 researches keep track of the animals movements. If 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. The test will continue through September. if If all goes well, they say, fwe can begin measuring temperature changes on our planet.
Questions 23 to 25 are based on the passage you have just heard.
23. What is the purpose of analyzing the speed of sound through the Pacific Ocean?
24. What was the reaction of the sea animals to the sound tests?
25. For what purpose were radio transmitters used?
选项
A、They were frightened and distressed.
B、They swam away when the speaker was turned on.
C、They swam closer to "examine" the speaker when it was turned off.
D、They didn’t seem to be frightened and kept swimming near the speaker.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/p517777K
0
大学英语六级
相关试题推荐
A、Commoncausesofanger.B、Judgingpeople’sbehavior.C、Changingpeople’sattitudes.D、Theeffectsofnegativebehavior.B选项概括性
A、Developmentalpsychologists.B、Friendsofthespeakers.C、Thesameperson.D、Fictionalcharacters.C对话中女士提到,HisfullnameisT
A、Ithasfriendlyfolks.B、Itsairisclean.C、Itisquiet.D、Itgiveshimasenseoffreshness.D由男士提到的Whenyou’vebeenstaying
A、Stayuptoolate.B、Misshercardgame.C、Indulgeinplayinggames.D、Taketooheavyaworkloadnextsemester.C由选项中的Stayupt
AsToyotaandHummerhavelearned,growingtoofastcanbeadangerousthing.Fromitsorigins,successintheautoindustr
A、ThechoiceofBaringsFactoryisbetter.B、Thechoiceofthehospitalisbetter.C、Thereisnoneedtochangethetopic.D、The
A、Theyusuallysay"Idon’tknow"inordertosavetime.B、Theymaygiveatouristawronganswersoastobepolite.C、Theycon
Inmostculturesthroughouttheworld,thereisanexpectationthatwhenapersonreachesadulthood,marriageshouldsoonfollow
IntotheUnknownTheworldhasneverseenpopulationageingbefore.Canitcope?[A]Untiltheearly1990snobodymu
Educationofexceptionalchildrenmeansprovisionofspecialeducationalservicestothosechildrenwhoareeitherhandicappedo
随机试题
为防止外资准入造成对国家根本安全的威胁,许多国家建立起()
男,25岁。四肢皮肤间断分批出现紫癜1个月,紫癜稍痒,略高出皮面,其余部位皮肤正常,既往体健。对诊断最无帮助的是
建设项目竣工环境保护验收时,对工业企业而言,噪声监测点一般设在工业企业单位法定厂界外()、高度()处。
不属于城市规划管理的作用是()。
在沉桩时应当停止锤击的情况有()。
概括阅读资料的主要内容。要求:全面、准确、条理清楚,限200字内。(20分)假设你是某市政府有关部门工作人员,你所在城市也开始出现大量的电动自行车,并因此引起社会各界和有关部门的争议。领导要求你以政府工作部门的名义给市政府起草一份如何处理本市电动自行车
某企业原有职工110人,其中技术人员是非技术人员的10倍,今年招聘后,两类人员的人数之比未变,且现有职工中技术人员比非技术人员多153人。问今年新招非技术人员多少名?
A、 B、 C、 D、 B此题若立刻作变换tanx=t或则在0≤x≤2π上不能确定出单值连续的反函数x=φ(t).可先利用周期性和奇偶性将积分区间缩小,在此小区间上作变换tanx=t.
若一棵二叉树的后序遍历序列为DGJHEBIFCA,中序遍历序列为DBGEHJACIF,则其前序遍历序列为(38)。
Accordingtothetext,itisnotsurprisingthat______.Accordingtotheauthor,thevariousconflictingviewsofeducation__
最新回复
(
0
)