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、Organisms far below the Earth’s surface. B、New drilling methods. C、A hidden underground world. D、Rare and infectious bacteria.
A、Organisms far below the Earth’s surface. B、New drilling methods. C、A hidden underground world. D、Rare and infectious bacteria.
admin
2016-07-29
73
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. We’ve found a very special organism. Let’s call it Type-A bacterium. 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: These bacteria were adapted to an environment that’s completely different from humans’. That’s to say, they could not survive in our environment. So we really don’t need to worry about these bacteria causing illness in people.
1. What have Dr. Brown and his team discovered?
2. What helps to confirm the existence of bacteria below the Earth’s surface?
3. How deep down did the man find the bacteria?
4. Why does the man say there is no danger of infection by the bacteria brought to surface?
选项
A、Organisms far below the Earth’s surface.
B、New drilling methods.
C、A hidden underground world.
D、Rare and infectious bacteria.
答案
A
解析
通常情况下,长对话都会开宗明义,所以考生一定要注意听力材料的开头句。从对话的开头句可知布朗博士和他的团队在地底下发现了细菌,细菌也是生物的一种,故选A。
转载请注明原文地址:https://kaotiyun.com/show/UvG7777K
0
大学英语六级
相关试题推荐
A、Theprofessoristired.B、Theprofessorislazy.C、Theprofessorissick.D、Theprofessorisawesome.A男士说:“今天早上我们发现教授在办公室睡觉。”
A、Gooutfishing.B、Cheerupherself.C、Cooksomefishfordinner.D、Dineoutwithhim.D根据对话,女士的烤箱被室友损坏了,男士建议她跟自己去外面吃。故D正确。动词原形
Negotiationsworkwonders.Thisisparticularlysoininternationalbusinesssinceitismostlythroughnegotiationsthatexport
A、Themaincharacterremainsthesame.B、Themaincharacterrealizeshisdreams.C、Themaincharacterdiesintheend.D、Themai
A、$100milliondollars.B、$670milliondollars.C、$20billiondollars.D、$25billiondollars.C短文说,今年假期网上消费估计达250亿美元,比去年增长25%,则去
A、Togivethemfruits.B、Toprovidewater.C、Toplantflowers.D、Tokeeppets.B短文谈到,其中一个最确定的方法是提供水,故选B。
A、Tracingtraveltrendsaroundthewholeworld.B、Helpingcountriespromotetourismcampaigns.C、Providingguidesforpeopleto
InternationalWomen’sDay(8March)isanoccasionmarkedbywomen’sgroupsaroundtheworld.Thisdateisalsocommemoratedatth
InternationalWomen’sDay(8March)isanoccasionmarkedbywomen’sgroupsaroundtheworld.Thisdateisalsocommemoratedatth
随机试题
角膜接触镜的并发症有
在某温度时,下列体系属于缓冲溶液的是()。
根据《全国主体功能区规划》,优化开发区域的发展方向和开发原则包括()。
对于结构施工、安装装饰装修阶段,防治扬尘污染的规定,下列说法正确的是()。
下列属于设备基础常见质量通病是()。
永续年金是一组在无限期内金额()、方向()、时间间隔()的现金流。
赊销在企业生产经营中所发挥的作用有()。
转让国有土地使用权、地上的建筑及其附着物并取得收入的(),都是土地增值税的纳税义务人。
阅读下面短文,回答问题。利用机会就是乘时;机会稍纵即逝,所以__________而__________以外,还该__________而__________。治生或者说致富的过程,在那时有三个阶段:第一,“无财作力”,以劳力赚钱。稍有积蓄,便是第二
己知一批袋装食品的重量服从正态分布,从中分别抽取样本量为20,50,100的样本,当样本量增大时,样本均值的标准差()。[江苏大学2011研]
最新回复
(
0
)