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
37
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、They were driven by steam engines.
B、They were pulled by animals or humans.
C、They were pulled by riders themselves.
D、There were totally unusable.
答案
B
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/2884958.html
相关试题推荐
[originaltext]Ifyouvisitabigcityanywhereintheworld,youwillproba
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[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
随机试题
Idoubtstrongly____________________(我们能否从中获利).if/whetherwewillmakeaprofi
Forcenturies,inthecountriesofsouthandSoutheastAsiatheelephanthas
[originaltext]W:Whataterrificdrawing,Mark!Ididn’tknowyoucouldpaint.
Science,inpractice,dependsfarlessontheexperimentsitpreparesthanon
软件的质量属性是衡量软件非功能性需求的重要因素。可用性质量属性主要关注软件系统的
新奥法是奥地利学者从长期的隧道施工实践中从岩体力学的观点出发而提出的一种合理施工
A.生物素酰肼B.3-(N-马来酰亚胺-丙酰)-生物胞素C.荧光素D.N-羟基丁
招标方式不包括()A:公开招标B:邀请招标C:自愿招标D:议标
A.6:1 B.4:1 C.5:1 D.10:1
(2014年真题)根据《水闸安全鉴定管理办法》(水建管〔2008〕214号),某
最新回复
(
0
)