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
101
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
[originaltext]M:OK,soifyou’rereadytotaketheplunge,ifyouwannagetou
Low-carbonFuture:WeCanAffordtoGoGreen[A]Tacklingclimat
[originaltext]Noscenarioisricherwiththepotentialimpolitenessthanthe
关于蒙代尔·弗莱明模型,下列说法不正确的是()A.汇率制度决定了货币
平均利润和生产价格形成后为什么还会存在超额利润?它的本质是什么?
胃痛的主要病变脏腑在胃,但与胃痛关系最密切的脏腑是()A.脾、肾 B.脾
下面是同源双功能交联剂的是A.羟琥珀亚胺酯B.戊二醛C.过碘酸化钠D.亲和素E.
(2018年11月)按照劳动标准的功能划分,可分为( )。A.技术类劳动标准
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
为了调查某市慢性病的分布情况,对3个区8个不同地段抽取50岁及以上的老人共580
最新回复
(
0
)