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
46
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/2884959.html
相关试题推荐
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[originaltext]M:Hey,Karen.Youarenotreallyreadingit,areyou?W:Pardon?
[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]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
[originaltext]Youshouldnotfearspidersbecauseoftheirpoison.Ofallt
随机试题
下列关于爆炸极限的说法中正确的是()。A.物质发生爆炸不必在其爆炸极限范
浮点运算可由阶码运算和尾数运算两部分组成。
张力性尿失禁易并发于下列何种疾病A.膀胱膨出 B.阴道壁囊肿 C.子宫内翻
全国中小企业股份转让系统(NationalEquitiesExchangeand
五倍子气味是A.无臭,味涩、苦,略回甜B.气微,味淡C.气清香,味辛、凉D.微有
下列不属于京剧四大名旦的是() A.尚小云B.荀慧生C.周信芳 D.程砚
实验材料: 一根吸管、一块橡皮泥、一只盛满水的水杯。 实验步骤: ①然后从
蒙医药基础知识中,“三秽”指的是A.隆、赤巴、培根 B.赫依、希日、巴达干
结合酶的非蛋白部分( )。A.同工酶 B.酶原 C.活性中心 D.必需基
发生不可抗力时,属于发包人责任的是()。A.施工人员伤亡补偿金 B.施工机械
最新回复
(
0
)