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
91
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:http://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
ResolvingConflictinaMulticulturalEnvironmentI.Definitionofculture
QuickChangeinStrategyforaBooksellerInthemovieY
Howdidtheearlypeopledotheircounting?Atfirst,theydidalltheircou
外加剂硫酸钠含量的测定方法有重量法和离子交换重量法。采用重量法测定试样加入氯化铵
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
关于室内无车道且无人员停留的机械式汽车库设置的说法,错误的是()。A.汽车
(2017年真题)投资者买IF1506,卖出IF1509,以期持有一段时间后反向
假定甲国在2008年时的货币流通情况完全符合费雪方程式的特点,此时甲国国内货币流
下列关于项目质量复核的说法中,正确的有( )。A.在实施项目质量复核的过程中,项
下列各种化合物中,分子间有氢键的是:A.CH3Br B.NH3 C.C
最新回复
(
0
)