关闭图标
log图标

toefl.viplgw.cn

  • 使用手机注册
  • 使用邮箱注册
  • 手机号不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    用户名不能为空!

    密码不能为空!

已有账号? 登录到雷哥托福
关闭图标
log图标
  • 使用手机找回密码
  • 使用邮箱找回密码
  • 手机号不能为空!

    验证码不能为空!

    密码不能为空!

  • 邮箱不能为空!

    验证码不能为空!

    密码不能为空!

又想起来了
加入生词本

listen

英['lɪs(ə)n] 美['lɪsn]
vi. 听,倾听;听从,听信
n. 听,倾听

已添加
×

我要举报草莓小菇凉评论

用户头像
草莓小菇凉:说的非常好,十分有道理,棒棒棒!

06-08 15:44:55

请选择举报类型:

举报电话:400 1816 180    举报QQ:2095453331
×
logo图标
分享到雷哥托福

分享成功图标分享成功

邀请名师点评成功,管理员正在安排老师进行点评。

继续做题 返回首页
支付雷豆失败图标 雷豆余额不足 购买雷豆 返回
报告题目错误
请选择错误类型:
请描述一下这个错误:

取消

文章结构

Official 33-L1 .the Great Pyramid 点击收藏

标准

  • 高音
  • 静音
  • 句子
    精听
  • 全文
    精听
  • 听写
    模式
  • 点击查看本句

    听写本句 再播一遍 下一句
  • 点击查看全文

    再播一遍本文

    Listen to part of a lecture in an archaeology class.

    The Great Pyramid of Giza in Egypt might be the most famous building in the world.

    We know exactly when it was built.

    Construction started in 2547 B.C.E., about 4500 years ago.

    We know who had it built.

    That was the pharaoh Khufu.

    And we know who oversaw its construction - the pharaoh's brother.

    We know so many things about it, but the funny thing is: we still don't know exactly how it was built.

    This picture will give you an idea of the size of the Pyramid and the size of the blocks it's made out of.

    About two million stone blocks were used to build the Great Pyramid and they are incredibly massive.

    The average weight is two and a half tons.

    The problem that has puzzled scholars for centuries is how were these blocks lifted up the height of this massive structure and then fit into place and without the benefit of modern technology.

    Of course, there've been a lot of theories over the centuries.

    The oldest recorded one is by the Greek historian Herodotus.

    He visited Egypt around 450 B.C.E., when the Pyramid was already 2000 years old.

    His theory was that cranes were used, much like we use cranes today to construct tall buildings.

    And Herodotus may have seen Egyptians using cranes made of wood.

    But the problem with this theory has to do with simple mechanics.

    A crane needs a wide and sturdy base to stand on or it will fall over.

    Well, as you get toward the top of the Pyramid, there's really no place for a crane to stand.

    The stone blocks are too narrow to provide a base.

    Well, so much for that theory.

    The next one has to do with the use of a ramp that would allow workers to drag a stone block up the side of the structure.

    Of course the ramp can't be too steep.

    It has to have a long gentle slope.

    And that's the problem.

    If you build a ramp with a slight slope up to the top of a Pyramid that's over 130 meters high, it would have to be almost two kilometers long.

    Well, the Pyramid is built on a flat area called the Giza Plateau.

    The Plateau is simply not big enough to accommodate a two-kilometer-long ramp.

    OK. So what now?

    Well, if you've ever driven on a mountain road, you'd know that it has a lot of twists and turns and bends in it because that's how engineers keep the road from having to be too steep.

    So why not wrap the ramp around the Pyramid, building the ramp around it as you go?

    Sounds like a pretty good idea.

    Except it's got a serious problem.

    See... one of the most remarkable things about the Great Pyramid is how accurate the proportions are.

    The dimensions are almost perfect.

    To get that perfection, the engineers must have had to measure it repeatedly during construction.

    And the way you'd measure it is from the four corners of the base.

    Well, if you got a ramp spiraling up from the base of the Pyramid, those corners would be buried by that ramp during construction.

    Well, who says the ramp has to be on the outside of the Pyramid?

    And now we get to the latest idea.

    If the ramp were on the inside of the Pyramid, the corners at the base would be exposed so the engineers could do their measurements while they were building.

    Well, an architect named Houdin has spent a few years working on making computer models of the building of the Pyramid.

    And what Houdin believes is that an exterior straight ramp was used to construct the bottom third of the Pyramid.

    This ramp would have been fairly short.

    It probably rose less than 50 meters.

    Then the rest of the Pyramid was constructed using an internal ramp that spiraled around the inside of the Pyramid.

    But how can we test this idea?

    Well, there are several ways to look inside the Pyramid.

    One is called microgravimetry.

    Microgravimetry is a technique that's used to detect voids inside a structure.

    You can then take the data and generate an image that shows any empty spaces in the interior.

    Well, in 1986, French scientists completed a microgravimetric survey of the Pyramid.

    And one of the images they produced showed an empty spiral-shaped space inside it.

    The shape of that space corresponds exactly to what Houdin thought the ramp would look like.

    I think Herodotus would be convinced.

    We might very well be at the end of centuries of guessing.

    • special
    ☞查看答案 再播一遍

联系雷哥托福

全国免费咨询热线:400 1816 180

  • 上海(总部)
  • 北京
  • 成都
  • 杭州
  • 武汉
  • 南京
  • 广州
  • 西安
  • 重庆
  • 深圳
  • 上海(总部)服务中心

    电话:400 1816 180

    地址:上海市徐汇区文定路218号德必徐家汇WE艺术湾B座205

    公交路线:76路、93路、138路宜山路蒲汇塘路站;205路、732路、754路南丹路宜山路站;205路、754路、830路南丹路文定路站等

    地铁路线:地铁3号线、4号线宜山路站出站470m;地铁1号线、4号线上海体育馆站出站600m。

  • 北京服务中心

    电话:400 1816 180

    地址:北京市朝阳区雅宝路7号 E园EPARK大厦508

    公交路线:乘坐公交44路外环;58路;139路;特12路外环;特2路;夜20路外环到雅宝路公交站 下车,走140米即可达到。

    地铁路线:乘坐地铁1号线、2号线到建国门站(A出口)步行1000米即可到达;乘坐地铁2号线、6号线到朝阳门站(A出口)步行1200米即可到达雅宝路7号 E园EPARK大厦。

  • 成都服务中心

    电话:400 1816 180

    地址:成都市锦江区总府路31号Z31六楼(皇冠假日酒店旁)

    公交路线:乘坐58路、98路、锦城观光3号线、熊猫快线5号线在春熙路步行街北站下 步行约281米。

    地铁路线:乘坐地铁2号线或者3号线到春熙路C口下,步行约982米

  • 杭州服务中心

    电话:400 1816 180

    地址:杭州市江干区江锦路159号 平安金融中心B座8楼

    公交路线:901路、105路环线、106路环线、9M路:富春路民心路口站 176路:市民中心北大门站,市民中心西大门站

    地铁路线:号线钱江路站;4号线钱江路,江锦路

  • 武汉服务中心

    电话:400 1816 180

    地址:武汉市珞瑜路光谷世界城广场写字楼1栋1单元14层11421室

    公交路线:乘坐18路,25路,340路,510路,518路,521路等公交车到珞瑜路湖北省中医院站下车

    地铁路线:乘坐地铁2号线至珞雄路A口出,往湖北省中医院光谷院区方向步行50米至世界城广场写字楼

  • 南京服务中心

    电话:400 1816 180

    地址: 南京市秦淮区中山东路532号金蝶科技园 H1幢308号(林客社 内)

    公交路线:5路 34路 34路区间 36路 55路 59路 y5路夜间 17路 65路 115路 118路 y17路夜间

    地铁路线:地铁2号线明故宫站1号口出,向东200米

  • 广州服务中心

    电话:400 1816 180

    地址:广州市天河区体育西路103号维多利广场B座26楼K15

    公交路线:11,18,20,230,278,293,45,583,669,886冼村路中站下。 194,40,777,778,90,观光2路花城广场路站下。

    地铁路线:乘坐地铁APM线至花城大道站下B口出,步行约500米即可到达保利威座大厦北塔。

  • 西安服务中心

    电话:400 1816 180

    地址:西安市莲湖区北大街西华门十字西南角78号嘉会广场C座4层B021号

    公交路线:4路、12路、26路、36路、37路、229路、游7钟楼北站;15路、16路、32路、102路、182路、236路、286路西华门站。

    地铁路线:地铁二号线钟楼站150米;地铁一号线/二号线北大街站700米。

  • 重庆服务中心

    电话:400 1816 180

    地址:重庆市渝中区邹容路68号大都会广场16楼1603-1604室

    公交路线:401、135、114、111、401、151、862、181、262、105、866、153、466

    地铁路线:2号线临江门站500米、1号线小什字站500米、6号线小什字站500米。

  • 深圳服务中心

    电话:400 1816 180

    地址:深圳市罗湖区书城路都市名园B栋5楼B区(只接受预约拜访)

    公交路线:101路 10路 12路 203路 214路 215路 223路 29路 3路 85路 M112路 M191路 M192路 N3路 P100路(定制公交请预约) 高快巴士200号线 高快巴士20路 高快巴士863号线到地王大厦下,步行431米即可到达。

    地铁路线:乘坐1号线/罗宝线/2号线/蛇口线到大剧院(E口)出,步行498米即可到达都市名园B栋

预约托福考试规划师