首页
登录
职称英语
Narrator Listen to part of a lecture in an archaeology class. Now
Narrator Listen to part of a lecture in an archaeology class. Now
游客
2024-01-04
36
管理
问题
Narrator
Listen to part of a lecture in an archaeology class.
Now get ready to answer questions. You may use your notes to help you answer. [br] How does the professor introduce fossilization through dehydration?
Last time we talked about the discovery of dinosaurs and today we are gonna have a discussion on the study and preservation of fossils. People sometimes ask, "Why waste time studying fossils?" Studying fossils is far from being a waste of time, because... uh...we can learn many useful facts from them. Generally speaking, fossils are especially important...um...because they are the only clues to the existence and appearance of life on Earth millions of years ago. Now, you may have a question, "how do fossils tell the existence and appearance of life on Earth?" You see...um...fossils are arranged in proper geological order. So, they reveal how life has steadily developed from the primeval creatures to the... the complex animals of today. Such knowledge helps us to understand the origins and evolution of life. What I mean is that such knowledge helps us to understand a little of what we ourselves are.
In addition, fossils can also be used to identify different kinds of sedimentary rocks... like... the rocks below ground level or those separated by miles of ocean. Even rocks which are at very great depths can be identified by their fossil contents. What I’m trying to say is...um...that fossils are valuable aids to mining and petroleum engineers. What it means is that fossils can help mining and petroleum engineers to find oilfields. Of the fossils, the microfossils are particularly helpful. The
microfossils refer to the tiny fossils. How are they used to find the oilfields? First, the engineers separate... um... the tiny fossils from the rocks they have got by drilling. And then, the specimens are examined under a microscope. According to the info obtained from these specimens, the engineers can tell whether the rocks are of the kinds associated with oilfields. In other words, these tiny fossils can tell whether the place has oils or not.
Alright. Now, I would like to talk about the preservation of fossils, that is, how fossils are preserved. Different fossils have been preserved in different ways—some are preserved as moulds or casts. What I’m trying to say is that some have been preserved in a shape of a plant or animal left in rock. Others are preserved as frozen dead bodies. The most remarkable fossil remains are some Polish rhinoceros remains These remains...um...were completely filled with oil. So...uh...they were finely preserved. One actually can see the animal’s flesh, skin and hair. Isn’t this amazing? So, another very rare way in which animals can become fossilized is through dehydration, that is, through drying up something by taking off all the liquid. Speaking of dehydration, you may think of mummies in Egypt. The process of making mummies is called dehydration. In terms of fossilization happens in arid conditions, which means it happens in dry places with no moisture at all like the desert. Or... um... it happens in a continually dry atmosphere. This dry atmosphere makes happen the complete... um... dehydration of all soft parts...before the body decays. For example, in New Mexico and Arizona, mummies of sloths have been found in caves and volcanic craters. The skin, hair, and claws of the sloths can be clearly seen.
Finally, some insects were fossilized by being trapped in amber. These fossils show great details of the insects and have been found in countries...bordering the Baltic Sea. The fossils of these insects represent another and a very interesting way in which life forms have become fossilized.
选项
A、She provides a detailed explanation of how fossilization is formed through dehydration.
B、She compares the dehydration in fossilization to that in the preservation of mummies.
C、She gives a very detailed description about the process of dehydration in fossilization.
D、She explains how fossilization takes place through dehydration with many examples.
答案
B
解析
本题为组织结构题,要求考生能够辨认出讲话的要点、细节、例证,注意到表示介绍、结论、话题转换的语言提示,并能够辨别离题话和插入话,从而把握讲话者所表达内容的整体结构。题目问:教授是如何介绍通过使用脱水(dehydration)方法化石的形成过程的?因为教授在介绍过程时,提到了木乃伊的脱水。他是通过联系这种人们所熟悉的现象来解释脱水的含义,所以选项B为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3333256.html
相关试题推荐
Theprojectwillbeassessedby___________________.(a)seniorlecturer录音中的mark“
(Through)hisessays,poems,andlectures,RalphWaldoEmersonestablished(hims
NarratorListentoapartofadiscussioninabiologyclass.[img]2011q1/ct
NarratorListentoapartofadiscussioninabiologyclass.[img]2011q1/ct
NarratorListentoapartofadiscussioninabiologyclass.[img]2011q1/ct
NarratorListentoapartofadiscussioninabiologyclass.[img]2011q1/ct
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofaconversationinanoffice.[img]2011q1/ct_etoe
随机试题
Seekingtobuildsupportamongblackfamiliesforitseducationreformlaw,
[originaltext]M:Whereareyougoingonholidaythisyear?W:Idon’tknowyet
ReadingPassage2hastenparagraphs,A-J.Whichparagraphsstatethefollowin
消火栓系统中,下列触发信号可以联动启动消防水泵的有()。A.消火栓按钮的
在工程网络计划中,关键线路是指()的线路。A:双代号网络计划中总持续时间最长
“半壁孤城水一弯,万家烟火壮雄关。黄河曲曲涛南下,紫塞隆隆障北环”赞誉的是(
(2020年真题)下列关于证券登记结算公司的说法,正确的有( ) Ⅰ证券登记
关于仓库保管的基本要求,下列说法正确的有()。A:面向通道进行保管 B:根据出
药品生产环节重大改革的关键是()A.深化医药卫生体制改革,推进健康中国建设
与甲状腺功能亢进发病机制有关的因素是A.抗甲状腺胶质抗原的抗体 B.抗甲状腺细
最新回复
(
0
)