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
2023-10-15
45
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] 【D9】
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
foundation
解析
(录音最后提到“the base or ground on which the dam is built is the‘foundation’”,因此该空所指平面为foundation。)
转载请注明原文地址:https://tihaiku.com/zcyy/3099681.html
相关试题推荐
Whichcodematchestheshapegivenattheendoftheline?[img]2016m3x/ct_eyyjs
[img]2016m3x/ct_eyyjscz2015c_eyyjscd_0021_20163[/img]Atmoviepreview,repo
[img]2016m3x/ct_eyyjscz2015c_eyyjscd_0021_20163[/img]Atmoviepreview,repo
[img]2016m3x/ct_eyyjscz2015c_eyyjscd_0021_20163[/img]Atmoviepreview,repo
[img]2016m3x/ct_eyyjscz2015c_eyyjscd_0021_20163[/img]Atmoviepreview,repo
[img]2016m3x/ct_eyyjscz2014j_eyyjsciq_0206_20163[/img]A、 B、 C、
WhereToGo,WhatToDo[img]2016m3x/ct_eyyjscz2014c_eyyjscr
WhereToGo,WhatToDo[img]2016m3x/ct_eyyjscz2014c_eyyjscr
WhereToGo,WhatToDo[img]2016m3x/ct_eyyjscz2014c_eyyjscr
[img]2016m3x/ct_eyyjscz2014j_eyyjscreadb_0168_20163[/img]Forecastingwhatl
随机试题
元曲的兴起对于中国民族诗歌的发展和文化的繁荣有着深远的影响。TherisingofYuanoperahasgreatinfluencesont
合同是当事人意思表示一致的结果,()是合同生效的重要构成要件。A.意思表示
语言L={AmBn|m≥0,n≥0}的正规表达式是()。A.A*BB*
喷嚏反射的生理意义在于()A.增加鼻腔腺体分泌 B.因鼻腔局部刺激
按照监管要求,商业银行内部审计部门对贷款分类进行检查和评估的频率为( )。A.
股权投资基金的信息披露不包含( )。A.基金合同及招募说明书等宣传推介文件
下列可以认定夫妻感情确已破裂的条件是()。A.重婚或有配偶者与他人同居的
何谓主题班会?主题班会的形式主要有哪些?
(2018年真题)关于绩效面谈技巧的说法,正确的是()。A.在绩效面谈中,
2013年年末,假设某商业银行相关指标为:人民币流动性资产余额125亿元,流动性
最新回复
(
0
)