6.Throughout history soldiers have fought bloody battles in order to control the high ground.There is no doubt that this is a tactical (戰(zhàn)術(shù)的)necessity.Standing above your enemy is an advantage that often leads to victory.
Nowadays,high ground does not just mean hill-tops.It also means space,which has become an increasingly important part of military strategy (軍事戰(zhàn)略).
With its more advanced satellite technologies,America is the major power in space.And now the US Air Force has put into service a new weapon designed to jam enemy satellite communications.It is an important step toward US control of space.
The so-called Counter Communications System (反衛(wèi)星通信系統(tǒng))was declared operational on November 1.The ground-based system uses electromagnetic radio frequencies (無(wú)線電磁波)to stop enemy satellites working on a short-term basis.
"A short-term effect ensures that during the time of need,the enemy's space-based capability (能力)is reduced,"said a US military official."Following the time of need,their capabilities can return to its original state."
The system is made up of an antenna (天線),transmitters (發(fā)射機(jī))and receivers and can be easily transported around in a vehicle.
To control space was one of four aims of a national space policy started by former president bill Clinton in 1996.The goal is to make sure US forces can rely on space-based services and to deny an enemy any similar benefits.
The US military has experimented with several"anti-satellite"weapons,including lasers,to destroy or damage enemy units.
Theresa Hitchens,vice president of the Centre for Defence Information in Washington,welcomed the new system as long as it does not create rubbish that could threaten global use of space.She believed it should not destroy satellites,only stop them working for a while.
Unfortunately,it seems we are not going to limit our goal for‘space control'to non-violent systems,"she said,raising the danger of a space arms race.
To change the balance of power in space the EU and China are working together on the Galileo project.By 2010the system will be in place as an alternative to the Americans'global positioning service.
71.What's the significance(意義)of the Counter Communications System to the US?B
A.It can help avoid bloody battles.
B.It can bring the US closer to its goal for"space control".
C.It can ensure the US forces to depend on space-based services.
D.It can destroy enemy equipment.
72.How does the new system work?It affects the enemy byD.
A.being transported around easily in a vehicle
B.controlling the high ground
C.damaging them
D.blocking their satellite communications
73.One thing that seemed to worry Theresa Hitchens is that the new weaponD.
A.could increase the danger of a space arms race
B.is not effective enough
C.is not threatening enough
D.might produce dangerous waste
74.What can we infer from the passage?A
A.New space weapons may be on the way.
B.The US military have never stopped experimenting with anti-satellite weapons.
C.The Galileo Project,when in effect,can match the Counter Communications System in power.
D.In future wars,space battles will decide human's fate (命運(yùn)).
75.The word"short-term"in Paragraph 4means closest toC.
A.reducing capability
B.effective for a special period of time
C.not lasting long
D.the time of need.
分析 本文主要介紹美國(guó)利用反衛(wèi)星通信系統(tǒng)占領(lǐng)太空空間,中國(guó)和歐洲為了達(dá)到空間平等也在反衛(wèi)星通信系統(tǒng)方面努力.
解答 BDDAC
71 B 細(xì)節(jié)題.根據(jù)倒數(shù)第二段it seems we are not going to limit our goal for‘space control'to non-violent systems,"可知反衛(wèi)星通信系統(tǒng)的意義是美國(guó)想對(duì)太空空間進(jìn)行控制,故選B.
72 D 細(xì)節(jié)題.由第四段第二句The ground-based system uses electromagnetic radio frequencies (無(wú)線電磁波)to stop enemy satellites working on a short-term basis.可知反衛(wèi)星通信系統(tǒng)是通過(guò)中斷衛(wèi)星交流而影響敵人的,故選D.
73 D 細(xì)節(jié)題.第九段中第一句話Theresa Hitchens,vice president of the Centre for Defence Information in Washington,welcomed the new system as long as it does not create rubbish that could threaten global use of space可知Theresa Hitchens擔(dān)心的事情是新的武器可能會(huì)導(dǎo)致太空垃圾,故選D.
74 A 推斷題.根據(jù)最后一段By 2010the system will be in place as an alternative to the Americans'global positioning service.可知.中國(guó)和歐洲為了達(dá)到空間平等也在反衛(wèi)星通信系統(tǒng)方面努力,故選A.
75 C 猜測(cè)詞意題.根據(jù)第五段的A short-term effect ensures that during the time of need,the enemy's space-based capability (能力)is reduced,"可知A short-term 的意思是短期影響敵人的太空能力,故選C.
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