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 n
It is hard to track the blue whale, the ocean’s largest creature which has almost been killed off by commercial whaling and is n
admin
2010-03-26
23
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 【S1】______ sightings are too unreliable to give real 【S2】______ into its behavior.
So biologists were delighted early this year when with the help of the Navy, they were able to 【S3】______ a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of under water 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 【S4】______ its global network of underwater listening system built over the decades to track the ships of 【S5】______ enemies.
Earth scientists announced at a news conference recently that they had used the system for closely 【S6】______ a deep-sea volcanic eruption (爆发) for the first time.
The speed of sound in water is 【S7】______ one mile a second—slower than through land but faster than through air. What is most important, different 【S8】______ of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it 【S9】______ faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even 【S10】______ weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.
A) layers B) roughly C) observation D) monitoring
E) visual F) uncover G) discover H) carries
I) relatively J) visible K) insight L) examining
M) potential N) considerably O) track
【S3】
选项
答案
O
解析
从语法结构上判断应选择一个动词原形,而选项中有两个动词:discover(发现)和track(跟踪),意思容易混淆。但从上下文理解应是“跟踪某一只蓝鲸43天”。故应选O。
转载请注明原文地址:https://kaotiyun.com/show/R5k7777K
0
大学英语四级
相关试题推荐
A、Theuseofphotographsinpainting.B、TheTVprogramaboutNormanRockwell.C、TheSaturdayEveningPostmagazine.D、Exhibitso
A、Therewasatrafficaccident.B、Acarwassmashedbyafallingobject.C、Acarhitsomeonenearthehighbuilding.D、Adriver
LippettsHillisnowthemaintrainingcentrewherearmyofficersarereceivingtraining.Thepepperspraysprayedinacrimina
LippettsHillisnowthemaintrainingcentrewherearmyofficersarereceivingtraining.PeopleinBritainallagreethatmore
AccordingtoGoleman,thebiggestdifferencebetweenthetwoCEOsdescribedinthefirstparagraphliesin______.Thephrase"
A、Togethelpwiththecourse.B、TochatwithJacksocially.C、Tohandintheirassignments.D、Topracticegivinginterviews.A[
A、ItneedstohavemoreFrenchlessontapes.B、Itneedstohaveitscontrolsrepaired.C、Itisdifferentfromalltheotherlabo
A、ThegrowthofDetroitasanindustrialcity.B、Detroit,thefifthlargestcityintheU.S.A.C、Thegeographicaladvantageso
A、Theboy’smotherhashadanaccident.B、Theboy’smotherdoesn’tknowofhiscondition.C、Theboy’smotherisinseriouscondi
Thepurposeofthispassageistoillustratethehumanbrain’sincrediblecapacityformemory.Almostallmnemonictechniques
随机试题
该患者可能的诊断为若需要利尿治疗,下列哪项不合适
丁卡因不宜用于
关于单身妇女的人工授精,正确的是
下列有关工程师对索赔作出决定的说法中,正确的是()。
影响抽样误差的因素有()。
关于证券投资的风险与收益,下列描述正确的有( )。
税务代理法律关系的确定是以( )为标志的。
甲在乙家做客时,无意间发现乙家抽屉里有一张他人出具给乙的借条,金额为6000元。甲于是将该借条盗走。后甲找到债务人,称乙让自己来收钱。债务人知道他是乙的好朋友,于是将6000元现金支付给甲。甲的行为构成
在网络需求详细分析中除包括网络总体需求分析、综合布线需求分析、网络可用性与可靠性分析、网络安全性需求分析,还需要做的工作是()。
Whatisthepurposeofthetalk?
最新回复
(
0
)