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
21
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/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
[originaltext]HealthofficialsinBrazilhavedeclaredastateofemergency
ShoppersonBlackFriday,thetraditionalstartoftheholidayshoppingseas
[originaltext]M:HiJane,pleasecomeinandtakeaseat.W:Well,youwouldli
[originaltext] (5)Britainhasannouncedstrictmeasurestocurbbankers’bonu
某大型泵站施工需进行一段河流改道作为其引渠,其相关资料见下表,则最终发包人应向承
建设项目财务管理的目标是()和防止违规、违法的现象发生。A:控制和降低建设造价
17世纪捷克大教育家夸美纽斯在其()中对班级授课制给予了系统的理论描述。A.《普
测定地基土的静止侧压力系数K0时,可选用下列()原位测试方法。 A.平板载
变态心理学的研究对象包括()。 (A)变态心理的定义(B)变态心理的种类
某拟建工业生产项目,基础数据如下。 (1)建设投资5000万元(其中含无形资产
最新回复
(
0
)