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
2012-12-13
28
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, these anaerobic bacteria could not survive in our environment. So we really don’ t need to worry about these bacteria causing illnesses 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
这段对话谈论的主题是地表以下的细菌,与之意思相符的只有选项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/SZb7777K
0
大学英语六级
相关试题推荐
Thebusdriveractedwithgreatpresenceofmindto______disaster.
Aftermuchquestioning,thepoliceman______enoughinformationfromthewitnesses.
Ahealthyeconomyseems__________withgovernmentmonopolyinanycountries.
The________runnercanrun2milesinfifteenminutes.
A、Hebecameacourageoussoldier.B、Hebecameanambulancedriver.C、Hewrotesomebooksaboutwar.D、Heworkedasawarcorresp
Marriagemayimproveyoursleep,andbettersleepmayimproveyourmarriage,twonewstudiessuggest.Womenwhoaremarried
A、Acceptthejobofferfromthebookstore.B、AcceptthejobofferfromIBM.C、IntheholidayworkinIBMandinthenextschool
Marriagemayimproveyoursleep,andbettersleepmayimproveyourmarriage,twonewstudiessuggest.Womenwhoaremarried
A、Healwayssayswhathewantstosay.B、Henevercomestothepoint.C、Hecanhardlyexpresshimselfclearly.D、Hespeakstoof
随机试题
学校产生于
男性,62岁。哮证日久,气急难续,咳呛,痰少质黏,口燥咽干,舌红少苔,脉细数者,治宜选用()
由于多索茶碱独特的心血管耐受性的特点决定了
沥青路面封层的作用不包括()。
各种会计核算形式之间的区别,主要表现在登记()的依据和方法不同。
常用的保温材料可分为( )。
下列关于建设用地使用权抵押的说法,正确的是()。
旅行社的性质包括_______、_______、_______。
Beijing’stophotelsarefieldingscoresofcallsfromforeignersandChinesepeopleeagertobookroomsduringthe2008Olympic
在一个市场中有两组消费者,他们对某一商品的反需求函数分别为P1(y1)和P2(y2),这里y1和y2分别为两组消费者对这种商品的需求量,P1和P2为对应的价格。这两组消费者的价格弹性分别为ε1(y1)和ε2(y2),存在|ε1(y1)|>|ε2(y2)|。
最新回复
(
0
)