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
It is now almost two years since the European Union decided to go ahead with plans to launch a satellite-navigation network to r
It is now almost two years since the European Union decided to go ahead with plans to launch a satellite-navigation network to r
admin
2009-09-12
72
问题
It is now almost two years since the European Union decided to go ahead with plans to launch a satellite-navigation network to rival America’s existing Global Positioning System (GPS). For much of this time, Galileo, the European system, met with strong opposition from America. However, a round of talks last November seems to have ease American concerns. The final details remained to be negotiated in talks, but the outlook for an agreement was good.
The core of the disagreement between the EU and America was whether the signals from the two competing systems might interfere with one another. More specifically, the Americans wanted the ability to jam Galileo without rendering GPS signals ineffective. The agreement reached in November was the first step in this direction. In return for the modification of Galileo’s signals, the Americans agreed to give Europe technical assistance in developing Galileo, and to make sure that the third generation of GPS, to be carried out in 2012, will conform to Galileo’s standards. This will aid the interoperability (互用性)of the two systems, which is a commercial goal of both sides. It will also, in principle, give the Europeans the ability to jam the American signals in the event of a crisis in which the two sides’ interests differ.
There is a bewildering array Of different sorts of signals involved in each network. GPS currently has two, a civilian channel known as C/A and a military one, Y-channel. Plans for an additional military channel, called M-code, are in the works. Galileo will debut (初次公开) with five different signals: one freely available to all; a commercial service which is more precise; a "safety-of-life" service that can be used for critical applications; a "public regulated service" (PRS) which will be used by the EU’s governments; and a fifth service that combines positioning information with a distress beacon, which could be used by ships at sea. The negotiations in November resolved a conflict between America’s M-code and the European PRS. What remains is to harmonize Galileo’s free signal with the M-code.
Both systems rely on signals precisely timed from atomic clocks carried by the satellites. A user looks at the time on at least four satellites, and triangulates (作三角测量)between them to find his position. Differences in the details of the different signals are what make the fees of applications. Some are more precise than others, and they also have different levels of encryption, to prevent unauthorized users from accessing them.
选项
A、EU and US are always having disagreements on almost everything.
B、US becomes an enemy of EU because of their satellite network.
C、The talks between EU and US have resulted in complete agreement.
D、Even though disagreement still exists, agreement can be expected.
答案
D
解析
由题干中的the first paragraph定位到原文首段。[精析] 原文首段最后一句but the outlook for an agreement was good(但是达成一致的前景乐观)用强转折词but强调协议的前景乐观,也即达成协议有望之意。故D)“虽然分歧依然存在,但达成一致仍可期待”正确。[排除干扰] A)“欧盟和美国总是几乎在所有事情上存在分歧”观点扩大化,原文只提及在卫星方面的分歧;原文只是提及两者to rival(竞争),并未提及两者成为enemy,故排除B);由原文The final details remained to be negotiated in talks(最终细节还有待讨论)可推知C)“欧盟和美国之间的谈判已经达成了完全一致”错误,也排除。
转载请注明原文地址:https://kaotiyun.com/show/6X37777K
0
大学英语四级
相关试题推荐
A、Becausehewasofferedajobthere.B、Becausehewantedtodosomethingdifferent.C、Becausehecouldgetpeopletheretocomm
A、Cheeseisaneglectedfood.B、CheesewasinventedinAsia.C、Freshcheeseistasty.D、Ripenedcheeseistasteless.B原文中提到,人们认为
A、Thefinancialindustry.B、Theserviceindustry.C、Themanufacturingindustry.D、Thehealthcareindustry.D由原文可知,人工智能已经在改变着医疗保
Inthe1960sand1970s,classicsocialpsychologicalstudieswereconductedthatprovidedevidencethatevennormal,decentpeop
WhatAmericaWoninthe"WaronPoverty"?A)Insupportofgovernmentactiontoeasetheplightofthepoor,PresidentObama
Themorechoicespeoplehave,theriskierthedecisionstheymake,accordingtoanewstudywhichshedslightonhowwebehavew
Playingvideogames,includingviolentshootergames,may【C1】________children’slearning,healthandsocialskills,accordingto
ThecityofBathwasfoundedbytheRomansalmosttwothousandyearsago.Ithasbeenfamousforits【C1】________pleasingarchite
A、Freedomfromjobstress.B、Freedomfromunemployment.C、Freedomfromlaws.D、Freedomfromstudy.A
A、Becauseitisagainstthelaw.B、BecausethemanisnotamemberofTerry’sfamily.C、Becausethewomancannotfindthetest.
随机试题
副溶血弧菌所致细菌性食物中的主要污染食品来自()。
甲公司是一家国有控股上市公司,采用经济增加值作为业绩评价指标,目前,控股股东正对甲公司2014年度的经营业绩进行评价,相关资料如下。(1)甲公司2013年末和2014年末资产负债表如下:(2)甲公司2014年度利润相关资料如下:(3)甲公司201
1844年7月3日,中美第一个不平等条约《望厦条约》的签署地是澳门的()。
2017年2月17日,某县公安局发出通知,现将上半部分摘录如下:“2017年2月6日至2月12日我辖区内发生一系列针对出租车的砸车窗盗窃车内财物案件,给人民群众的财产带来较大的损失,公安局提醒广大群众提高防范意识,积极配合公安机关做好打击防控工作。一、
“社会一旦有技术上的需要,则这种需要比十所大学更能把科学推向前进。”这表明()。
中国人对知识与思想、文风与人品、政治与学术,向来很难划开一道理性的界限,把本来只是经验和感觉的判断,常常当成评价一切的铁律。其实,元好问早就说“心画心声总失真,文章宁复见为人”,刘因也曾说“若将字字论心术,恐有无边受屈人”。以下观点与原文意思最相
古人把东、西、南、北四方中的每一方想象为四种动物形象,叫作四象。四象在中国传统文化中指青龙、白虎、朱雀、玄武,分别代表东西南北四个方向。它源于中国古代的:
材料题:材料(大意):小张是借调到某单位的年轻职工。他和该单位领导及该单位职工老赵一起去某县调研。该县是领导以前工作过的地方。在调研中小张发现该县存在很严重的问题,他对老赵说要向领导汇报,老赵建议小张谨慎点好。调研结束后还没等到向领导汇
所谓计算机系统的全部资源,它指的是
SecretsofStrongFamiliesAgroupofAmericanmarriageandfamilycounselorsonceplacedabriefnoticeinfourdozennewsp
最新回复
(
0
)