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
47
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
旅馆客房之间的送、排风管道,必须采取消声降噪措施,其消声量的选取原则为()。
经汽油和乙醇浸泡后,反光膜表面不应出现()。A.软化、起泡 B.皱纹 C.渗
“不索取和非法收受患者财物;不收受医疗器械、药品、试剂等生产、经营企业或人员以各
Ayoungmanwasgettingreadytograduat
证券发行市场又称()。 A、二级市场 B、次级市场 C、流通市场
A.吊销《药品生产许可证》B.吊销《药品经营许可证》C.吊销《医疗机构制剂许可证
避雷针金属表面严重锈蚀,影响外观,应视为()缺陷(A)一般(B)严重
某大型商务楼位于市中心十字路口,32层,层高3m,地下2层,地上1~7层是商业用
出现性行为问题的主要原因包括()。A:生理、心理和社会环境的因素 B:个人、集
根据《房屋建筑与装饰工程工程量计算规范》(GB50854-2013),斜屋面防水
最新回复
(
0
)