首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Disadvantages of tall buildings. B、Modem elevators. C、The Crystal Palace Exhibition. D、The invention of the elevator. D
A、Disadvantages of tall buildings. B、Modem elevators. C、The Crystal Palace Exhibition. D、The invention of the elevator. D
admin
2009-10-19
65
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、Disadvantages of tall buildings.
B、Modem 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://kaotiyun.com/show/E6t7777K
0
大学英语四级
相关试题推荐
A、It’s50dollars.B、It’s100dollars.C、It’s200dollars.D、Theconversationdidn’ttellus.DWhatistheregularpriceofeach
A、shefooledherfather.B、shewantedherfathertopickitup.C、herfatherwaslookingforthepenny.D、alloftheabovewere
WehavereasontobelievethatZhangQuanwillrefusetolivewithoutAmericangoods.ThemostordersofBoeingcomefromChina
Arsenal’sgoalkeeperJensLehmannwascouldn’tcontinuetoplaybecausehewasinjuredbySamuelEto’o.Bronekhorstplayedas
PaulT.Rankinfoundthattheaverageindividualspentmostofhiswakingtimeeitherreading,writing,speakingorlistening.
A、Hepersuadedthemannottosendthejudgewine.B、liepersuadedthemantosendthejudgewine.C、liewaspleasedwithwhatt
A、Athissummerschool.B、Athisbrother’saddress.C、InBoston.D、Athisforwardingaddress.BW:WherecanIwriteyouthissum
A、Tosave3dollars.B、Tobuyitatonce.C、Toask3dollarsfromtheparent.D、Tosave5dollars.BWhatdoesthespeaker’sson
Whiletravelingabroad,Mr.JacksonFrankranshortofmoney.Sohewrotetohisbrother,askingfor$500."Sendthemoneybyte
Thebiggestoilspillhappenedin1989.Theauthorsuggestsdrivingincarpoolstouselessoil.
随机试题
甲公司与乙公司签订一份技术开发合同,未约定技术秘密成果的归属。甲公司按约支付了研究开发经费和报酬后,乙公司交付了全部技术成果资料。后甲公司在未告知乙公司的情况下,以普通使用许可的方式许可丙公司使用该技术,乙公司在未告知甲公司的情况下,以独占使用许可的方式许
A.体重B.身长C.上、下部测量D.前囟E.上臂围体格测量可以反映一些生长发育及疾病情况,反映某些内分泌疾病有帮助的指标是
男,20岁,大学生。不食、不语伴行为异常6个月。曾在当地医院就诊,此次入院检查:神志清,仰卧,头颈悬空不动,无自发言语,拒绝服从医生的简单指令,眼球活动自如。有时候突然拍门或抢病友的东西。体格检查未见异常。能够最快缓解其症状的治疗措施是
哺乳期妇女用药注意事项包括
在下列微分方程中,以函数y=C1e-x+C2e4x(C1,C2为任意常数)为通解的微分方程是()。
出口口岸()征免()
对于二手个人住房贷款,商业银行最主要的合作单位是()。
负强化与惩罚在本质上是相同的。()
根据我国现行宪法的规定,有权制定基本法律的国家机关是()(2014年一综一第16题)
Itisoftenthroughgooddinnersthatonemakesfriends.InJapan,thereare【B1】______"DiningGroups"or"WineGroups",formedb
最新回复
(
0
)