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
2024-03-03
54
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/3501218.html
相关试题推荐
[originaltext]Ifyouvisitabigcityanywhereintheworld,youwillproba
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
随机试题
Theoldbootshadbothered(烦扰)himsomuchthatJohnnydecidedtothrowthe
GainingCrossculturalandInternationalPerspectives:ABookReview
[originaltext]Hundredsofviolinsaremadeeveryday.However,thefinestw
Forthispart,youareallowed30minutestowriteanessayonreasonsofonline
防火检查中,使用游标卡尺实测检查翻盖式灭火器箱箱盖,国家工程技术标准要求翻盖式灭
设计合同生效后,委托方向承包方交付了5000元定金,如果承包方不履行合同,则应返
在集装箱装卸工艺系统中,储存能力较差的系统是( )。 A.跨运车工艺
空负载试车的一般步骤包括()。A、办理各项竣工交接手续B、审查各项准备工作是否
A.维生素B B.维生素B C.烟酸 D.泛酸 E.叶酸缺乏时可以引起脚
根据现行规范规定,瓷质卫生陶瓷的吸水率最大值是()。A.0.3% B.0.4
最新回复
(
0
)