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
37
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、Steel cables.
B、Guide rails.
C、An open carriage.
D、Strong ropes.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3501219.html
相关试题推荐
[originaltext]Ifyouvisitabigcityanywhereintheworld,youwillproba
[originaltext]Ifyouvisitabigcityanywhereintheworld,youwillproba
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]W:Pleasehaveaseat,MrSuanders.Ireceivedyourresumelastw
[originaltext]Therearebetween3,000and6,000publiclanguagesinthewor
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]DeepSpringsisanAmericancollege.Itisanunusualcollege
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
随机试题
Accordingtothenews,it’sNOTriskytoinvestyourmoneyon[br][originaltex
[originaltext]Tinabegantolookforanewjob.Shewenttotheemployment
法国画家夏尔丹的画能赋予静物生命。1728年他的静物()展出,一举成名,被接
在线库存系统中,一个更新程序会标记顺序号码文件作为正式更新库存前的最后一步,但有
A.内庭、鱼际 B.风池、外关 C.列缺、照海 D.太溪、鱼际 E.行间
地铁车站施工中,混凝土终凝后及时养护,结构混凝土养护期不得少于()。A、7D
共用题干 EveryDogHasHisSayKimikoFukuda
与银行业相比,保险业的资产投资对经济增长的影响具有一些独特的属性。其中不包括(
下列各项中,属于经济衰退阶段采用财务管理战略要点的有()。A.实行长期租赁
(2017年真题)下列各项因素中,通常影响注册会计师是否实施函证的决策的有(
最新回复
(
0
)