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、The presence of life-forms far below the Earth’s surface. B、The risk of infection from rare strains of bacteria. C、Fictional r
A、The presence of life-forms far below the Earth’s surface. B、The risk of infection from rare strains of bacteria. C、Fictional r
admin
2012-10-30
42
问题
W: Today’s guest on "Science Update" is David Brown. Dr. Brown, you and your team have found bacteria far below the Earth’s surface. You must be thrilled about your discovery.
M: Well, yes, it’s very exciting. For a long time we’d suspected the presence of such organisms, but we lacked substantial evidence.
W: How did you confirm the existence of the bacteria?
M: Well, technology helped. Our drilling techniques have improved significantly, and so the risk that surface bacteria could be mistaken for those found at much greater depth was reduced. With the new techniques, we could get much deeper into the Earth.
W: How far down did you actually get?
M: In one case, about three kilometers. We were surprised, I must tell you, that there were organisms that far down.
W: You know, it sounds like fiction, something like a lost world.
M: Let’s call it a hidden biosphere, and it’s probably a very extensive one. The mass of the living organisms below the surface may be equal in size to the mass of the surface bacteria.
W: Have you found any unique life-forms?
M: Yes. One of the organisms is the first anaerobic bacillus ever discovered. That means it can live and grow only where there is no oxygen.
W: Is there any danger of these bacteria infecting people when you bring them to the surface?
M: The bacteria in question were adapted to an environment that’s hostile and alien to humans. Conversely, there anaerobic bacteria could not survive in our environment. So we really don’t need to worry about these bacteria causing illness in people.
选项
A、The presence of life-forms far below the Earth’s surface.
B、The risk of infection from rare strains of bacteria.
C、Fictional representations of a hidden underground world.
D、The reliability of evidence collected by new drilling methods.
答案
A
解析
这段访谈谈论的主题是地表以下的细菌,与之意思相符有选项A。通常听力材料都会开宗明义,所以考生一定要注意听力材料的开头。
转载请注明原文地址:https://kaotiyun.com/show/2Z57777K
0
大学英语四级
相关试题推荐
Geographyisthestudyoftherelationshipbetweenpeopleandtheland.Geographers(地理学家)compareandcontrast【C1】______places
A、Whataturbiditycurrentis.B、Thecausesofunderwaterearthquakes.C、Howwindscanaffectsomeoceancurrents.D、Whytheboo
Oneofthemostimportantfeaturesthatdistinguishreadingfromlisteningisthenatureoftheaudience.【67】thewriteroftendo
ThereisprogresstowardapossibletreatmentforlungdiseasessuchasSARS(severeacuterespiratorysyndrome).Researchers
Acollegeeducationisaninvestmentinthefuture.Butitcanbea【47】one.TheCollegeBoard【48】thatthecostsatafour-yearp
Theimportantinformationis______fromonecomputertoantherthroughatelephoneline.
A、Andrewisanundergraduatestudent.B、Andrewhasworkedonanewspaperbefore.C、Andrewdoesnotwanttoworkonanewspaper.
Badteethcanbepainful—andworse.Theycanevenbedeadly.Infectionsofthegumsandteethcanreleasebacteriaintothebloo
HealthworkerswhoareHIVpositivearebannedfromperformingmostsurgeryordentaltreatmentincasetheycutthemselveswith
A、Toliveamorecomfortablelife.B、Togiveperformances.C、Tobeapupilofafamousviolinist.D、Toenterafamousuniversity
随机试题
检察机关提出抗诉的,第二审刑事判决书中应当将其写为
设函数f(x)和g(x)在[a,b]上连续,在(a,b)内可导,且f(a)=f(b)=0,g(x)≠0,证明在(a,b)内至少存在一点ε使得f′(ε)g(ε)+2f(ε)g′(ε)=0。
患者,女性,31岁,产后第5天。3小时前突然出现呼吸困难、胸痛、咳嗽、咯血。该患者最可能的诊断是
证见咳嗽气喘,咯痰黄稠,胸膈痞闷,甚则气急呕恶,烦躁不宁,舌质红,苔黄腻,脉滑数者。治宜首选
行政行为具有如下特征()。
三毛是哪位漫画家笔下的人物?()
阅读下面这篇公文,回答下列问题。关于表彰实施科技兴市“1+5”工程先进单位的通报各县(市、区)委,各县(市、区)人民政府,市委各部委,市各局委办,市各直属机关:2011年以来,
温家宝总理在政府报告中指出,做好2009年政府工作,必须把握好以下原则()。
交换机作为VLAN的核心,提供了哪些智能功能?_______
【B1】【B15】
最新回复
(
0
)