首页
登录
职称英语
[originaltext] Not long ago, some of you may have read about a team of mount
[originaltext] Not long ago, some of you may have read about a team of mount
游客
2025-01-14
9
管理
问题
Not long ago, some of you may have read about a team of mountain-climbing scientists who helped to recalculate the elevation of the highest mountain in the world: Mr. Everest. Of course, the elevation of Mt. Everest was determined many years ago, using traditional surveying methods. But these scientists wanted to make a more precise measurement using a new method that takes advantage of recent advances in technology. It’s called the Global Positioning System. The Global Positioning System uses 24 satellites that circle the Earth. Each of these satellites is constantly sending out signals. And each signal contains important information that can be used to determine the longitude, latitude, and elevation of any point on the Earth’s surface. Well, in order to use this system to calculate Mt. Everest’s elevation, scientists needed to put a special receiver on its summit to receive signals from the satellites. The problem with this was that, in the past, the receivers were much too heavy for climbers to carry. But now these receivers have been reduced to about the size and weight of a hand-held telephone, so climbers were able to take a receiver to the top of Everest and, from there, to access the satellite system signals that would allow them to determine the precise elevation. And it turns out that the famous peak is actually a few feet higher than was previously thought.
Q. 23. What is the talk mainly about?
Q. 24.Why does the speak mention a hand-held telephone?
Q. 25.According to the talk, what probably contributed most to the success of the new study of Mount Everest?
Q. 26.In the study described, how were satellites’ signals used?
选项
A、Detailed maps from previous studies.
B、Recent advances in technology.
C、Plenty of funding for the study.
D、Experience carrying heavy loads up mountains.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3912493.html
相关试题推荐
[originaltext]Therearetimeswhenpeoplearesotiredthattheyfallasleepal
[originaltext]Themosteffectivepeoplearethesamewhethertheyarchavinga
[originaltext]Themosteffectivepeoplearethesamewhethertheyarchavinga
[originaltext]W:DidyougotothefootballmatchonSaturday?M:No,Ihadto
[originaltext]W:DidyougotothefootballmatchonSaturday?M:No,Ihadto
[originaltext]W:DidyougotothefootballmatchonSaturday?M:No,Ihadto
[originaltext]You’veprobablyheardtheslogan"savethewhales".Doyoukn
[originaltext]W:ProfessorPierson,couldyougiveusabriefintroductionoft
[originaltext]W:ProfessorPierson,couldyougiveusabriefintroductionoft
[originaltext]WeallfindthatlearningEnglishtakeseffortanddedication
随机试题
MarriageinAncientEgyptTheancientEgyptiansheldma
[originaltext]RobertFrostwasborninSanFranciscoin1875andwassenta
AThebestknownmimosaisthesensitiveplant,BwhoseleavesfoldupandCcollap
AlthoughtherearemanyskillfulBraillereaders,thousandsofotherblindp
Recentresearchrevealedthatitisacommonbiologicalphenomenontoshedskin
心理咨询中使用的理性一情绪疗法,是在埃利斯的ABC理论的基础上建立的,其中B代表
关于建筑项目能耗水平分析评价的说法,正确的有( )。A:公共建筑空调系统新风量标
消除速率是单位时间内被A、肾脏消除的药量 B、胆道消除的药量 C、肺部消除的
蓄电池充电完成后检查充电装置进入___状态。静止;均衡充电;浮充电;稳定
教师的领导方式包括集权型、放任型和()。A.竞争型 B.指导型 C.民主
最新回复
(
0
)