首页
登录
职称英语
NarratorListen to part of a lecture in an archaeology class.Now get ready to a
NarratorListen to part of a lecture in an archaeology class.Now get ready to a
游客
2024-01-03
63
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] Which of the following does the professor mention as the benefits of the study of fossils?[Clink on 2 answers. ]
Narrator
Listen to part of a lecture in an archaeology class.
Professor
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.
Now get ready to answer questions. You may use your notes to help you answer.
18. What does the professor mainly discuss in the lecture?
19. Which of the following does the professor mention as the benefits of the study of fossils?
20. What are the ways of preserving fossils mentioned in the discussion?
Listen again to part of the lecture. Then answer the question.
Professor
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?"
21. What does the professor imply when he says this?
Professor
Now, you may have a question, "how do fossils tell the existence and appearance of life on Earth?"
22.Why does the professor say this?
Professor
What I’m trying to say is that some have been preserved in a shape of a plant or animal left in rock.
23. How does the professor introduce fossilization through dehydration?
选项
A、It provides information on how dinosaurs become extinct.
B、It helps petroleum engineers with the finding of oil.
C、It helps petroleum engineers to purify oil.
D、It gives clues to how life originated and evolved.
答案
B,D
解析
本题为细节多选题,考查考生理解并记住听力材料中所谈到的多个细节和事实。题目问:下面哪些选项是教授所提到的化石研究的好处?教授在谈话中提到研究化石的两点好处,一是“Such knowledge helps us to understand the origins and evolution of life(这种知识有助于我们了解生命的起源和演变)”,二是“fossils can also be used to identify different kinds ofsedimentary rocks…fossils are valuable aids to mining and petroleum engineers(化石也能够被用来识别不同种类的沉积岩石……化石是矿石和石油工程师的有价值的帮手)”,而选项A、C在文中均未提到,故正确答案为选项B和D。
转载请注明原文地址:https://tihaiku.com/zcyy/3330376.html
相关试题推荐
(Through)hisessays,poems,andlectures,RalphWaldoEmersonestablished(hims
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofatalkinahistorylecture.[img]2011q1/ct_etoe
NarratorListentoapartofalectureinanecologyclass.[img]2011q1/ct_et
NarratorListentoapartofalectureinanecologyclass.[img]2011q1/ct_et
NarratorListentoapartofalectureinacomputerclass.[img]2011q1/ct_et
NarratorListentoapartofalectureinacomputerclass.[img]2011q1/ct_et
NarratorListentoalectureintheliteratureclass.[img]2011q1/ct_etoefm_
随机试题
IFBNO.CMC9301308ThePeople’sRepublicofChinaChinaNationalMachineryImpo
A.cosx-sinx+C B.sinx+cosx+C C.sinx-cos
在立即数寻址方式中,立即数放在()A.数据段 B.代码段 C.堆栈段 D.
用户使用软件时难免会出现一些操作错误。在设计用户界面时必须考虑出错处理,使用户不
有一根预制混凝土桩,采用锤击法施工,桩尖需穿透--密实砂层进人软黏土层,在穿透的
药物的两重性是指( )A.治疗作用与副作用 B.防治作用与不良反应 C.对
用于权属登记的房产测量成果备案时.下列内容中.房地产行政主管部门不需审核的是(
员工流失是员工()离开组织的行为。A.被迫 B.主动 C.岗位不对口 D.
土洞形成的过程中,水起的主要作用为下列哪个选项( )A.水的渗透作用 B.
股份有限公司董事、高级管理人员可以兼任监事。()
最新回复
(
0
)