首页
登录
职称英语
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img] ITAIPU DAM: Vi
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img] ITAIPU DAM: Vi
游客
2024-08-10
6
管理
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.
[br] 【D2】
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
$20 billion
解析
(录音中指出该大坝的建造总费用为200万美元,“The total cost of the building was 20billion dollars”。)
转载请注明原文地址:https://tihaiku.com/zcyy/3714290.html
相关试题推荐
Whatistheprobablerelationshipbetweenthemanandthewoman?[img]2016m3x/ct
Whatistheprobablerelationshipbetweenthemanandthewoman?[img]2016m3x/ct
[img]2016m12s/ct_eyyjsbz2015j_eyyjsbd_0200_201611[/img][br][originaltext]Int
[img]2016m12s/ct_eyyjsbz2015j_eyyjsbd_0200_201611[/img][br][originaltext]Int
[img]2016m12s/ct_eyyjsbz2015j_eyyjsbd_0200_201611[/img][br][originaltext]Int
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img]ITAIPUDAM:Vi
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img]ITAIPUDAM:Vi
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img]ITAIPUDAM:Vi
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img]ITAIPUDAM:Vi
[img]2016m3x/ct_eyyjsbz2014j_eyyjsbd_0305_20163[/img]ITAIPUDAM:Vi
随机试题
FromAccountanttoYogi:MakingaRadicalCareerChange[A]Atsomepoint,a
清暑益气汤(《温热经纬》)组成中含有的药物是A.连翘、竹叶 B.人参、麦冬
竣工验收准备工作的主要内容包括( )。A.整理技术资料 B.绘制竣工图 C
下列哪项不是广地龙的性状特征A.呈长条状薄片,弯曲B.全体具环节,背部棕褐色至紫
确定销售促进预算的方式主要有()。 A.自前而后 B.自上而下
(2020年真题)“老师,小樱又大闹天宫了!”班长气喘吁吁地跑来告诉正准备去上课
根据《建筑抗震设计规范》(GB50011—2010),下列说法中错误的是(
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
关于利率市场化对商业银行的影响,说法正确的有( )。A.利率波动的不确定性影响
新生儿先天性甲状腺功能减低症的典型实验室检查结果是A.T↓、TSH正常 B.T
最新回复
(
0
)