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
80
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、On short trips.
B、On long trips.
C、When flying over cities.
D、When flying at high altitude.
答案
A
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3004426.html
相关试题推荐
[originaltext]Insciencethemeaningoftheword"explain"sufferswithciv
[originaltext]Insciencethemeaningoftheword"explain"sufferswithciv
[originaltext]Itisoftensaidthatthegrassisalwaysgreenerontheothe
[originaltext]M:Iwanttoregisterforthismathematicscourse.W:I’msorryr
[originaltext]M:Iwanttoregisterforthismathematicscourse.W:I’msorryr
[originaltext]W:Hello?M:Hi,May,thisisBillJohns.W:Ohhi,Bill.Youwer
[originaltext]W:Hello?M:Hi,May,thisisBillJohns.W:Ohhi,Bill.Youwer
[originaltext]W:Hello?M:Hi,May,thisisBillJohns.W:Ohhi,Bill.Youwer
[originaltext]Thegreatadvanceinrockettheory40yearsagoshowedthatl
[originaltext]Thegreatadvanceinrockettheory40yearsagoshowedthatl
随机试题
TheUniversityinTransformation,editedbyAustralianfuturistsSohailInay
TheDoubleNatureofLiteraryTranslationⅠ.Introduction
[originaltext]W:Hello?M:Hi,Jessica?W:Oh,hi,Mike.What’sup?M:Sorryto
Questions31-33AnswerthefollowinginformationaboutBritishEducationScholar
ToHelptheKids,ParentsGoBacktoSchool[A]Forafewyearsn
小型车停车库的净空高度不应小于:()A.2.0m B.2.2m C.2.
能诊断羊水过多的是A.妊娠末期羊水量大于2000ml B.妊娠32周以后羊水量
“因材施教”体现了人的身心发展的()。 A.顺序性 B.互补性 C.差异性
技术分析法比基础分析法具有优势,因此可以取代基本分析法。()
与大气相连通的自由水面下5m处的相对压强为:A.5at B.0.5at
最新回复
(
0
)