首页
登录
职称英语
[originaltext] What does maglev look like? Japanese engineers designed a veh
[originaltext] What does maglev look like? Japanese engineers designed a veh
游客
2024-02-14
65
管理
问题
What does maglev look like? Japanese engineers designed a vehicle that runs in a cradle-like track or guideway. Magnetic attraction and repulsion pull and push maglev forward. To stop the trains, the magnetic force is reversed, much like airplanes are stopped by reversing the force of the engines. Both types of maglev are quiet, fast, and save. Since maglev rides on air, there is no friction between wheels and rails to make noise or to slow it down. If the external power fails, there is a battery-operated system on the train itself that takes over and brings the cars to a smooth stop.
Maglev could be the answer to our problems. It could become the typical short and middle-distance mass transportation system of the twenty-first century. If it does, we will enjoy many benefits. We will ride in save, fast, quiet trains between cities up to about 500 miles apart in less time than it takes to fly if you include the time for ground transportation. We will conserve precious land because maglev can be built where railroads run, down the middle of existing super-highways or elevated above existing streets and roads. And we will probably save money, too. According to a German estimate, a mile of two-way track will cost about nine million dollars whereas a mile of interstate highway costs about 25 million dollars in the United States.
选项
A、A battery-operated system on the train will control and bring the cars to a smooth stop.
B、The magnetic attraction will hook the cars firmly.
C、The cars equipped with a device will run in a special guide way.
D、The internal power will keep the cars steady.
答案
A
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3448663.html
相关试题推荐
[originaltext]AbrahamLincolnwasborninalogcabininKentuckyonFebruar
[originaltext]Doctorssayangercanbeanextremelydamagingemotion,unles
[originaltext]Doctorssayangercanbeanextremelydamagingemotion,unles
[originaltext]The20thWinterOlympicshavejustendedinTurin,Italy.Butfor
[originaltext]The20thWinterOlympicshavejustendedinTurin,Italy.Butfor
[originaltext]W:We’dbetterbelookingforsalesondownjacketsandthermoun
[originaltext]W:We’dbetterbelookingforsalesondownjacketsandthermoun
[originaltext]W:We’dbetterbelookingforsalesondownjacketsandthermoun
[originaltext]Computersarebeingwidelyusedinmedicine.Themostcommon
[originaltext]W:SometimesIreallyhaveagoodmindtogiveupmyjob.Ifeel
随机试题
Physicalfitnesscanhelpyoutolivelonger,feel【11】andsolvelife’sprobl
[originaltext]W:DrManning,doyouhaveafewminutes?I’dliketoaskyouabo
【B1】[br]【B6】And→But本题考查逻辑关系。根据上下文判断,这里是讲本来夏威夷的人们说得是一种没有语法规则的混合语,但是在一代人后,他们却在讲一
Workingatypewriterbytouch,likeridingabicycleorstrollingonapath,
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
某招标有限公司受该市第一高级中学的委托,以公开招标的方式采购多媒体移动电教设备及
(2015年真题)藿胆丸除清热通窍外,又能( )。A.化痰散结 B.芳香化浊
某进口设备的离岸价为1500万元,到岸价为1550万元,关税为105万元,银行财
根据企业所得税法优惠政策的规定,企业购置用于()等专用设备的投资额,可以按一定
共用题干 患者,女性,38岁。发现血尿、蛋白尿5年,查体:BP150/90mm
最新回复
(
0
)