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
28
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
岛形反转形态一般出现在()的阶段。A、牛市尽头、熊市开始B、牛市C、熊市D、熊市尽头、牛市开始A,D在牛市尽头、熊市开始,或熊市尽头、牛市开始
TheSupremeCourtwillhearargumentstodayabouttheuseofpublicmoneyfo
【B1】[br]【B15】A、regardedB、judgedC、consideredD、measuredCisconsideredtobe.
标准体系涉及面广,对于工程项目标准体系评价结论应包括()。A.标准体系是否满足
下列导致海豹畸胎的药物是A.碘海醇 B.己烯雌酚 C.拜斯亭 D.溴隐停
有关栓剂置换价的正确表述为A.药物的重量与同体积栓剂基质重量比值 B.同体积不
根据下列资料回答问题。 《河北省2010年国民经济和社会发展统计公报》显示:河
一个饭店的绩效目标包括( )。A.整体绩效目标 B.公司绩效目标 C.岗位
以下情形中不予医师执业注册的是A.不具有完全民事行为能力的 B.受吊销医师执业
下列建设项目中,可以不招标的是()。A.个人捐的教育项目中合同估算价为180万
最新回复
(
0
)