首页
登录
职称英语
[originaltext] Although I think the United States generally has an excellent
[originaltext] Although I think the United States generally has an excellent
游客
2023-09-11
18
管理
问题
Although I think the United States generally has an excellent system of transporting people between cities that .are only a few hundred miles apart, a person commuting between Detroit and Chicago, or between san Francisco and Los Angeles, so-called strip cities, may spend only a relatively short time in the air while spending several hours getting to and from the airport. This situation makes flying almost as time-consuming as driving. Moreover, airplanes use a lot of their fuel just getting into the air. They simply are not fuel-efficient on short trips.
High-speed trains may be an answer. One fairly new proposal for such a train is for something called a "maglev", meaning a magnetically-levitated train.
Maglevs will not actually ride on the tracks, but will fly above tracks that are magnetically activated. This will save wear and tear on the tracks. These trains will be able to go faster than one hundred fifty miles per hour. At that speed, conventional trains have trouble staying on the tracks. As you can see, maglevs offer exciting possibilities for the future.
选项
A、It uses nuclear energy.
B、It rests on a cushion of professional air.
C、It flies over magnetically activated tracks.
D、It uses a device similar to a jet engine.
答案
C
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3004427.html
相关试题推荐
[originaltext]ThecolorfulInternetdrawsustocomputersandbringsusjoy
[originaltext]ThecolorfulInternetdrawsustocomputersandbringsusjoy
[originaltext]ThecolorfulInternetdrawsustocomputersandbringsusjoy
[originaltext]W:Hello,John,youmustbepleased.Afterall,howmanystudents
[originaltext]W:Hello,John,youmustbepleased.Afterall,howmanystudents
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]M:DoyouthinkthetravelagencywillbeopenonSaturdayaftern
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
[originaltext]OneofNewYork’smostbeautifulandvaluablebuildingsisin
随机试题
Commercialaquaculturecanbea【B1】______andenvironmentallysustainableact
MorethanfortywomenhavebeenkilledinthewarinIraq.Hundredsofothersha
ThespaceshuttleDiscoverycompleteditsmissionforabout______daysbeforei
Theygotooneoftheworld’smostprestigiousuniversitiesandpridethemse
[originaltext]Asaresultofrisinguniversitycosts,manystudentsarefin
急性淋巴结炎属中医()的范畴A.内痈 B.外痈 C.疽 D.发 E
已知集合。
画出电喇叭、调压变压器、电流互感器代表符号。
施工总承包单位应对其依法分包工程的施工质量问题承担( )。A.主要责任 B.
男,56岁,近日来感心悸,乏力。头晕,心电图示P-R间期在相继的心动周期中逐渐延
最新回复
(
0
)