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
2024-06-05
49
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/3620693.html
相关试题推荐
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
[originaltext]M:WhatisMr.JohnsongoingtodowithhisoldhouseonParisRo
[originaltext]NowandagainIhavehadhorribledreams,butnotenoughoft
[originaltext]NowandagainIhavehadhorribledreams,butnotenoughoft
[originaltext]NowandagainIhavehadhorribledreams,butnotenoughoft
[originaltext]M:Hello.NationalExpressCourierCompany,CustomerServiceDepa
随机试题
Poorashewas,hewas______makingprofitsattheexpenseofothers.A、aboveB、of
OfficialssaywaterlevelsalongtheBrahmaputraRiverstillareatdangerousle
TheGameoftheNameHerecomesJohnSmithwalkingtow
A提示:把x看作常量,对y求导。
以下材料哪些没有屈服台阶,不存在明显屈服点,脆性破坏?()。A.锰钢 B.灰
下列关于工业建筑物内有害物质产生与控制的说法,正确的是哪几项?()。A.有害
需夫妻双方同时治疗的炎症是A:外阴炎 B:慢性宫颈炎 C:老年性阴道炎 D
2009-160.十枣汤中配伍大枣的目的是 A.制约药物峻烈B.缓和药物毒性
共用题干 一般资料:求助者,女性,66岁,某工厂退休职工。案例介绍:求助者一年
利用科学的方法,搜集、整理、分析和提供有关社会现象数字资料的工作的总称,称之为(
最新回复
(
0
)