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
60
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://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
Whatarethechancesthatwewillencountersomealienformoflife,asweex
Atthefall2001SocialScienceHistoryAssociationconventioninChicago,
ThatLouiseJohannesisbelievedbymanycriticstobethegreatesttwentiet
Thousandsofschoolchildrenarehavingtheireducationdecidedbya"rollof
What’sthefurthestyouhaveevercycled?Perhapsyoucycletoschoolorto
关于图2-3中四海域洋流的叙述,正确的是( ) A.①处洋流属于风海流 B
判断疮痈的脓成与否的方法是()A.摸之有压痛 B.望之红肿 C.病人主
下列各项中,不符合内部牵制的要求的是()。A、出纳人员管票据 B、出纳人员
正常成人的尿比重约为A.1.001~1.005 B.1.005~1.010
根据FIDIC施工合同条件,以下有关工程师的说法,正确的是( )。A.工程师受
最新回复
(
0
)