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
64
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:http://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
[originaltext]M:Howareyournewneighbors?W:Theyseemniceenough,butthey
CarrieMeeberappearsin______.A、SisterCarrieB、TheScarletLetterC、TheRainbo
不是少年期自我意识发展的特点是()A.“成人感”出现 B.独立性增强 C.
下列对七氟烷的麻醉作用特点的描述,不正确的是A.麻醉性能强,诱导迅速 B.对心
慢性呼吸衰竭的患者,医嘱给予洛贝林静脉滴注,提示患者可能存在A.外周循环衰竭
房地产市场周期可分为( )。A.衰退期 B.形成期 C.繁荣期 D.复苏
(2018年真题)某6层建筑,建筑高度23m,每层建筑面积1100㎡,
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
关于附带民事诉讼的下列表述,错误的是:A.检察院不可以申请进行诉前财产保全 B
最新回复
(
0
)