首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、To carry information that would help determine elevation B、To provide accurate weather reports C、To relay information from sci
A、To carry information that would help determine elevation B、To provide accurate weather reports C、To relay information from sci
admin
2004-12-30
67
问题
Not long ago, some of you may have read about the team of mountain climbing scientists who helped to recalculate the elevation of the highest mountain in the world, Mount Everest(珠穆朗玛峰). Of cause the elevation of Mount 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 the satellites is constantly sending out signals, and each signal contains important information that can be used to determine the longitude, latitude and elevation at any point on the earth’s surface. Well in order to use the system to calculate amount of Everest’s elevation. Scientists need to put a special receiver on the 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 the receiver to the top of the 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 us previously thought.
选项
A、To carry information that would help determine elevation
B、To provide accurate weather reports
C、To relay information from scientists around the world
D、To indicate which route the mountain climbers should take
答案
A
解析
In the study described, how were satellite signals used?
转载请注明原文地址:https://kaotiyun.com/show/d78O777K
0
托福(TOEFL)
相关试题推荐
Youshouldspendabout20minutesonQuestions1-13,whicharebasedonReadingPassage1below.AHearingimpairmentorothera
Completethesummaryusingthelistofwords/phrases,A-l,below.ProblemsforpreschoolusersofvideogamesPr
Music:LanguageWeAllSpeakSectionAMusicisoneofthehumanspecie’srelativelyfewuniversalabilities.Withoutformaltra
Soviet’sNewWorkingWeekHistorianinvestigateshowStalinchangedthecalendartokeeptheSovietpeoplecontinuallyatwork.
LivingDunesWhenyouthinkofasanddune,youprobablypictureabarrenpileoflifelesssand.Butsanddunesareactuallydyn
LivingDunesWhenyouthinkofasanddune,youprobablypictureabarrenpileoflifelesssand.Butsanddunesareactuallydyn
Whattimedoesthelibraryopen?WhenwillSaturday’sfootballtrialsprobablyend?
Gavin’sapartmentislocatedonthe______.
Completethenotesbelow.WriteNOMORETHANTHREEWORDSforeachanswer.WRITINGPaycarefulattentiontothequestion
Theword"obscure"inline1isclosestinmeaningtoTheauthormentionstwentypercentinline23toindicatethat
随机试题
Carrinsiststhattheso-calledinformationsocietymightbemoreaccuratelydescribedastheinterruptionsociety:it________at
特发性血小板减少性紫癜(ITP)发病机制中起最主要作用的器官是
患者女性,22岁,因服吲哚美辛数片后觉胃痛,今晨呕咖啡样胃内容物400ml来诊。既往无胃病史。首选的检查是
患儿,3岁,诊断为维生素D缺乏性手足搐搦症,其治疗原则是
在美国,商标的首先使用人得到商标所有权,即使没办理注册手续,法律也给予承认和保护。()
某企业转让专利使用权,租赁期为5年,每年年末收取租金10万元,2015年无形资产摊销6万元,不考虑其他因素,该事项对营业利润的影响金额为()万元。
机构裁撤、合并、分设交接清单属于()的会计档案。
英语课程的评价体系要体现评价主体的()和评价形式的()。评价应关注学生综合语言运用能力的发展过程以及学习的效果。
请就其中一条做具体分析和阐述:假设你是一名中学教师,你会怎样引导学生践行这一条守则。
设随机变量X的概率分布为P{X=k}=,k=0,1,2,…,则常数a=
最新回复
(
0
)