首页
登录
职称英语
[originaltext] I wonder how many of you would went to work in a tall building
[originaltext] I wonder how many of you would went to work in a tall building
游客
2023-07-31
29
管理
问题
I wonder how many of you would went to work in a tall building such as the Empire State Building if you had to climb 102 flights of stairs to reach the top. Not many, I imagine. If it were not for the invention of elevators, or lifts, tall buildings would be unusable.
The first lift was just a box suspended on a rope. Using a series of pulleys, a group of oxen ox strong men would pull the rope end lift the box to a higher point. Lifts were used only for heavy materials, not passengers. Even in the nineteenth century, when steam power was used to operate the lifts, people didn’t ride them. They didn’t trust the rope that held the box.
In 1853, Elisha G. Otis invented the first safe lift. He showed his invention in New York at the Crystal Palace Exhibition. At the exhibition, Otis was pulled up in an open box that was attached to two guide mils. When he was lifted far above the spectators, he gave the order to cat the rope. To the amazement of the crowd, the lift did not fall straight downward to the floor. Instead, it was held fast to the guide rails by a certain device. He had built powerful metal clamps on the carriage as a safety measure. The demonstration worked, and people have been riding as passengers in elevators ever since.
选项
A、Disadvantages of tall buildings.
B、Modem elevators.
C、The Crystal Palace Exhibition.
D、The invention of the elevator.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2884957.html
相关试题推荐
[originaltext]Ifyouvisitabigcityanywhereintheworld,youwillproba
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]Therearebetween3,000and6,000publiclanguagesinthewor
[originaltext]Therearebetween3,000and6,000publiclanguagesinthewor
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
随机试题
Thedestructionofournaturalresourcesandcontaminationofourfoodsuppl
TheTouch-ScreenGenerationA)Onachillydaylastsprin
Themeeting’sbeencancelled.Ann_______allthatwork.A、needtodoB、needhave
诸侯互相争战是东周时期历史的一大特点。下列战争中发生在春秋时期的是()。A.城
常用技术分析指标有() Ⅰ.移动平均数 Ⅱ.相对强弱指数 Ⅲ.移动
导尿的目的应除外A.为尿潴留病人解除痛苦 B.收集24小时尿标本 C.排空膀
2010年,天津市全市生产总值突破9000亿元。据初步核算,并经国家统计局评估审
市场调查的第一步是确定问题和调查目标,调查项目可以分成以下三类( )。A.描述
A. B.(0,0) C. D.
一个8层建筑(33m高)防雷工程的分项工程内容有( )。A.建筑物等电位联结
最新回复
(
0
)