首页
登录
职称英语
[originaltext] I wonder how many of you would want to work in a tall buildin
[originaltext] I wonder how many of you would want to work in a tall buildin
游客
2023-07-22
39
管理
问题
I wonder how many of you would want 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 or strong men would pull the rope and 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 rails. When he was lifted far above the spectators, he gave the order to cut 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 mils by a certain device. He had built powerful metal clamps on the carriage as a safety measure. The demonstration worked, end people have been riding as passengers in elevators ever since.
选项
A、Disadvantages of tall buildings.
B、Modern elevators.
C、The Crystal Palace Exhibition.
D、The invention of the elevator.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2860393.html
相关试题推荐
[originaltext]W:Haveaseat,Mr.Baldwin.Youhaveaveryimpressiveresume.M
[originaltext]W:Wakeup,Eric,timetoriseandshine.M:Ha,oh,hi,Jane,I
[originaltext]M:Canyoutellmewherethedean’sofficeis?W:I’monmywayt
[originaltext]M:Canyoutellmewherethedean’sofficeis?W:I’monmywayt
[originaltext]M:Canyoutellmewherethedean’sofficeis?W:I’monmywayt
[originaltext]Welcometotoday’snewssegment,highlightingbusinessopport
[originaltext]Welcometotoday’snewssegment,highlightingbusinessopport
[originaltext]W:Oh,Larry,Ihavebeenmeaningtotalktoyou.M:Hi,Jane.Wh
[originaltext]W:Oh,Larry,Ihavebeenmeaningtotalktoyou.M:Hi,Jane.Wh
[originaltext]W:Oh,Larry,Ihavebeenmeaningtotalktoyou.M:Hi,Jane.Wh
随机试题
IntheUnitedStates,bothpublicandprivateuniversitiesdependonthefollowi
Idon’tseeany______ingoingonapicnicinsuchbadweather.A、dotB、pointC、lo
TheInternetandcellphonesarebringingpeopletogether,not【C1】______usa
Themoderncomicstripstartedoutasammunitioninanewspaperwarbetween
LichensTobecertain,alichenisnotthemo
配制的肠内营养液应该妥善保存,使用时间必须限制在A:32小时内 B:28小时内
根据DL/T722-2014《变压器油中溶解气体分析和判断导则》,利用平衡判据判
水利工程是用于控制和调配自然界的地表水和地下水,达到除害兴利目的而修建的工程。
企业电子商务系统设计与开发的主要任务包括()A.网站设计 B.数据库设计
(2015年真题)根据涉外经济法律制度的规定,投资者对外直接投资实行( )制度
最新回复
(
0
)