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
2023-07-13
81
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、Maglev would get many cars off roads in future.
B、Maglev would become only means of transportation.
C、Maglev would turn into a flying train.
D、Maglev would replace trans and planes.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2832398.html
相关试题推荐
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]W:Oh,it’ssocold.Wehaven’thadsuchaseverewinterforsol
[originaltext]Acomputerisamachinedesignedtoperformworkmathematical
[originaltext]Therearemanykindsofnervecells,andthischapterdealsm
[originaltext]PublicschoolsintheUnitedStatesareunderthecontrolof
[originaltext]W:CanIhelpyou?M:Nothanks,I’vegotmyticket,mI’mallRt
[originaltext]W:CanIhelpyou?M:Nothanks,I’vegotmyticket,mI’mallRt
[originaltext]W:Mr.Jones,yourstudent,Bill,showsgreatenthusiasmformusi
随机试题
阅读下面对话,根据其内容写一篇有关Mary去肯尼亚旅行的短文。要求:1.所写短文应与对话相关内容意义相符,涵盖其要点;2.用你自己的语言表达,可改写对话中
Thenewofficeblockoccupies______.[originaltext]OurFirm,togetherwitht
Theschoolauthorityagainststudents’smokingbothintheclassroomsandathom
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】____
Youneedalocalbankaccounttousethis.[br]Youcanavoidacommissionfeei
Youmayrelyuponitthatwecancontactyournearestrelative______anyaccide
中医的“证”包括A.邪正关系 B.病变原因 C.病变部位 D.病变性质
根据劳动争议调解仲裁法律制定的规定,下列劳动争议中,劳动仲裁机构作出的仲裁裁决,
关于水泥的技术要求,属于选择性指标的是()。A.体积安定性 B.细度
患儿,2岁。百日咳后持续发热半月余,体温在38℃左右。易倦纳差,消瘦,近1周头痛
最新回复
(
0
)