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
2025-02-08
30
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] What does the professor mainly discuss in the lecture?
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、How fossils are discovered and examined.
B、The importance and preservation of fossils.
C、How fossils are studied and investigated.
D、How fossils are used to locate oil and other resources.
答案
B
解析
本题为要点题,要求考生能够理解分散在听力材料中的关键词汇、词组或所阐述的观点和事实,并通过综合分析来确定听力材料的要点。题目问:教授在讲座中主要讨论了什么?讲座开头教授说:“Last time we talked about the discovery of dinosaurs and today we are gonna have a discussion on the study and preservation of fossils.(上次我们讲了恐龙的发现,今天我们将要讨论化石的研究和保存。)”因此正确答案为选项B。
转载请注明原文地址:https://tihaiku.com/zcyy/3947811.html
相关试题推荐
[img]2012q1/ct_etoefm_etoeflistz_0307_20121[/img][br]Listenagaintopartoft
"Caverns"[img]2012q1/ct_etoefm_etoefspeakc_1513_20121[/img]Nowlistent
[img]2012q1/ct_etoefm_etoefspeaka_1180_20121[/img]Listenforaquestionthat
[img]2012q1/ct_etoefm_etoefspeaka_1179_20121[/img]Listenforaquestionabou
NarratorListentopartofaconversationbetweentwostudents.No
NarratorListentopartofaconversationbetweentwostudents.No
NarratorListentopartofatalkinananthropologyclass.Nowge
NarratorListentopartofatalkinananthropologyclass.Nowge
NarratorListentopartofatalkinananthropologyclass.Nowge
NarratorListentopartofatalkinananthropologyclass.Nowge
随机试题
[originaltext](Man1)I’dprefertostayattheCapitalHotelduringtheconf
NarratorListentopartofalectureinanepidemiologyclass.Nowg
暮江吟 [唐]白居易 一道残阳铺水中,半江瑟瑟半江红。 可怜九月初三夜,露
许多抒情作品采用第一人称的抒情方式,却不直接倾诉自我的感受()
采用通风的方法将逸散的毒物排出,是预防职业中毒的一项A.根本性的措施 B.不可
24岁女性,畏寒、发热、全身酸痛1周,自服感冒药物,体温不退反升,近2天来乏力、
我国《旅游法》确立了旅游发展规划的法定地位,规定旅游规划应当与()相衔接。A.
以下财产质押中,属于商业银行可接受的是()。A.汇票、支票、本票 B.租用
(2019年真题)因债权人胡某下落不明,债务人陈某难以履行债务,遂依法将标的物提
企业申请民航空管及机场弱电系统工程专业一级承包资质时,净资产应不小于( )万元
最新回复
(
0
)