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
ITAIPU DAM: Vital statistics Location: Brazil and Paraguay Completion date:【D1】______ Purpose: Hydro-electric power Cost:【D2】___
ITAIPU DAM: Vital statistics Location: Brazil and Paraguay Completion date:【D1】______ Purpose: Hydro-electric power Cost:【D2】___
admin
2019-01-14
58
问题
ITAIPU DAM: Vital statistics
Location: Brazil and Paraguay
Completion date:【D1】______
Purpose: Hydro-electric power
Cost:【D2】______
Type: Gravity
Material:【D3】______
length: 7.8 kilometers
【D4】______: 196 meters
【D5】______: 1. 02 trillion cubic feet
There are two problems caused by the construction of the dam. One is that the water from the dam【D6】______which spread diseases among the people. The other is that the reservoir destroyed the rainforest, which consequently caused the death of【D7】______and other forest creatures.
Question 28 - 30 Label the diagram, and write one word for each blank.
【D3】
In this section, you will hear a short passage. For questions 21 -30, complete the notes using three words or fewer each blank. The passage will be read twice. Remember to write the answer on the answer sheet.
Hello and welcome to this, the fourth in our series of public lectures on Big Buildings. Today we’re going to take a look at the Itaipu Dam in South America. You may not know too much about Itaipu but it’ s been named one of the "Seven Wonders of the Modern World" by the American Society of Civil Engineers. And in this lecture, I hope to explain some of the reason why.
Ok, let’s begin with a few facts. First of all, where exactly is the Itaipu Dam? Well, it’ s on the Parana River, close to the border between Brazil and Paraguay. Construction began in 1975 and the dam was only finished in 1982. Two years later it started generating electricity and its now one of the largest hydro-electric power plants in the world. The total cost of the building was 20 billion dollars.
In design, it’s what is called a gravity dam, which means it relies on its immense weight for stability. The main section is made of concrete actually 15 times the amount of concrete that was used in creating the Channel Tunnel between England and France. To give you an idea of size, the dam is 7. 8 kilometers long, with a height of 196 meters. The reservoir behind the dam is huge—almost fifteen hundred square kilometers and the reservoir capacity is 1. 02 trillion cubic feet. The dam really is an amazing feat of engineering. Engineers actually had to change the course of the Parana, which is the seventh largest river in the world, and move 50 million tons of earth and rock in the process?
With any success story, I suppose there are bound to be a few problems. One is that the Itaipu Dam sometimes gets blocked with mud and silt, which is expensive to clear. But more seriously, this mud and silt carries bacteria, which can be transmitted in the water and cause illness in the people who use it. The other main problem was that when the land was originally flooded to create the reservoir, they destroyed a large area of rainforest, which was home to many birds and other forest creatures and sadly they died. Since then, however, seven new protected areas have been created for wildlife.
Ok, now let’s look at the construction of the dam. Can you see the point at the very bottom of the dam on the upstream face? That’s called the heel, just like part of your foot. And at the same point at the bottom of the downstream face of the dam is called the toe, also like the toe on your foot. On the top of the dam, that’s the part you can see above the water, the "crest" , and the base or ground on which the dam is built is the " foundation". I think that’s all you need to know for now.
选项
答案
concrete
解析
(从录音中提到的“The main section is made of concrete”,可知大坝的制成材料为混凝土。)
转载请注明原文地址:https://kaotiyun.com/show/0L8K777K
本试题收录于:
B类竞赛(英语专业本科专科)题库大学生英语竞赛(NECCS)分类
0
B类竞赛(英语专业本科专科)
大学生英语竞赛(NECCS)
相关试题推荐
Almosteverynewinnovationgoesthroughtherephases.Wheninitiallyintroducingintothemarket,theprocessofadoptionissl
WomenareaforceforchangeinAustraliansociety.TheprideofplacegiventomenasalmostthesoleshapersofAustralianhis
IfwereadEnglishlanguagenewspapersorlistentonewsreaderswhouseEnglishinalldifferentpartsoftheworld,wewillqui
Whatistheprojectmainlyconcernedwith?
Whatistheprojectmainlyconcernedwith?
FamousthroughoutEuropeandnowNorthAmerica,thered-jacketMichelinGuidehasrankingfinerestaurantsformorethanacentu
—Howdoyoufeelaboutcountriesthatdon’ttrytoreduceglobalwarming?—______,thosecountriescaremoreaboutmoneythansa
Birdsarewarmbloodedanimals.Thoughtheirfeathershelptokeepthemwarm,somebirdssuchasducks,【C1】______(goose),ands
Whatmentionedasthesurprisingfactinthestudy?
随机试题
审美意象是用来表达某种抽象的观念或者哲理的艺术形象,它是艺术家在构思过程中,将自己的审美情感、审美认识与客观的事物相融合,并以一定的艺术表达方式呈现出来的内心视像。根据上述定义,下列不属于审美意象的是:
实时频谱分析仪可用于非重复性且持续时间很短(如爆炸)的信号分析。
Lifeasawomaninthecolonial(殖民的)Americaseemsquitedifferentfromitistoday.Womenwereconsideredinferiortomen,a
社会主义现代化建设中,人民政协的基本职能是
王某涉嫌虐待被监管人罪,侦查终结后被移送下一诉讼程序,关于本案的补充侦查说法正确的是:()
从事导游业务,日常的接待礼仪包括()。
崔老师在绘画教学中,发现很多学生不敢动笔,于是要求每位同学在一张A4纸上随意进行抽象表现,结果每个学生都非常有信心,十分投入地大胆表现。这种教学活动属于()。
行政问责
设函数(n为正整数),则f(x)有().
How’sthisforacoincidence?CharlesDarwinandAbrahamLincolnwereborninthesameyear,onthesameday:Feb.12,1809.Alt
最新回复
(
0
)