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
Despite the ubiquity of computer technology, most people are unaware that Line computers exist in two mutually exclusive, disti
Despite the ubiquity of computer technology, most people are unaware that Line computers exist in two mutually exclusive, disti
admin
2012-01-15
55
问题
Despite the ubiquity of computer technology, most people are unaware that
Line computers exist in two mutually exclusive, distinct categories: analog and digital.
We are most familiar with digital computers, such as laptops. On the one hand,
digital computers process information using a binary number system that allows
(5) them to calculate numbers in an accurate and exact manner. Analog computers,
on the other hand, do not calculate per se; they measure and respond to a
continuously changing input.
Simple analog computers, called astrolabes, were first developed by the
Greeks to solve problems in astronomy. The devices proved very popular and
(10) soon spread throughout the Roman world. By the 10th century, Muslim scholars
had developed the astrolabe into a sophisticated mechanical device capable of
calculating solutions to problems not only in astronomy, but also in astrology,
navigation, surveying, and timekeeping.
Modern scientific opinion was that the ancient Greeks had been
(15) technologically unable to produce a similarly sophisticated computer, until a
discovery was made just over a century ago. In 1900, divers discovered the wreck
of a merchant ship, possibly dating back to 150 BCE, off the coast of the Greek
island Antikythera. In the wreckage, they found the remains of a complex device
apparently a thousand years ahead of its time.
(20) Made of metal, this device, known as the Antikythera mechanism, is
approximately the size of a shoebox. At the time of its discovery, it was in terrible
shape, having been underwater for so long. Its pieces had merged into a broken
mass and experts could discern only that it had something to do with astronomy.
Thanks to a combination of advanced imaging methods and X-ray computer
(25) tomography, however, scientists have since discovered much more.
Originally, the mechanism had at least 30 bronze gears with as many as 225
hand-cut triangular teeth. It had three main dials, one on the front and two on the
back, respectively marking the astronomical divisions of the Egyptian calendar,
the Metonic cycle, and the Saros cycle. Each dial had subdials for greater
(30) specificity. For example, the front dial contained a smaller dial that could be
adjusted to account for leap years. There were also hands and gearing to account
for the movements of the planets.
While the workings of the device are now fairly well understood, researchers
are still puzzled by the reason it was made. Some postulate that it, like later
(35) astrolabes, was used to create astrological charts, or to set feast days, or even to
adjust the lunar and solar calendars. Others have thought it was a curiosity made
solely for display. The device’s relatively small size and the inclusion of a 3,000
character "user’s manual" suggest that the mechanism was created to be portable
and functional, but scientists are no closer to knowing for sure and can only
(40) wonder at the purpose of its superb design.
The passage’s statement that, by the 10th century, Muslim scholars had developed the astrolabe into a sophisticated mechanical device would justify which of the following conclusions?
选项
A、Muslim scholars were unaware of other scientific measuring devices.
B、Muslim scholars developed a kind of technology that had never been known before.
C、There was no need for sophisticated mechanical devices such as the astrolabe before the 10th century.
D、The astrolabe’s sophistication allowed for more exploration of the physical world.
E、Muslim scholars had a need to solve complex problems in astronomy, navigation, surveying, and timekeeping.
答案
E
解析
转载请注明原文地址:https://kaotiyun.com/show/8jjO777K
本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
相关试题推荐
Walkingthroughthewoodsalonecanbeafrighteningprospectforakid,butnotfor7-year-oldMatthewofPortland,Oregon.He
Alawyerfriendofminehasdevotedherselftotheserviceofhumanity.Herspecialareaiscalled"publicinterestlaw".Man
Theprimaryfunctionofthesecondparagraphofthepassageisto______Whichofthefollowingbestdescribestherelationoft
OBDURATE:
IMPUGN:
JEOPARDY:ENDANGER::
Becausemarinealgaeindirectlyremoveatmosphericcarbondioxide,amajor(i)______inmarinealgaepopulationsmightresultin
ThosewhotookClark’sold-manneredcomplianceforobsequiousness(i)______him:hisapparent(ii)______veiledafervent(iii)_
A(i)____acceptanceofcontemporaryformsofsocialbehaviorhasmisledafewintobelievingthatvaluesinconflictwiththep
随机试题
下列数据结构中,能用二分法进行查找的是()。
企业业务流程再造最早是由()提出的。
患者,女性,43岁。右下腹持续性疼痛5天,伴恶心、呕吐,呕吐物为胃内容物。体温38.5℃。体检发现右下腹5cm×5.5cm大小肿块,触痛明显。最可能的诊断是
对支气管扩张及肺脓肿等分泌物量大的病人,常需采用下列哪种方法排痰?()
根据我国宪法规定,下列哪些内容既可以是国家所有,也可以是集体所有?()
可用来加工焊缝坡口,特别适用于开U形坡口的气割的方法为( )。
0,9,26,65,124,()
一、注意事项1.申论考试是对考生阅读能力、综合分析能力、提出和解决问题能力以及文字表达能力的测试。2.仔细阅读给定资料,按照后面提出的“作答要求”作答。二、给定资料1.1月31日,2010年路面一号文件《中共中央国务院关于加大
请运用中国法制史的理论和知识对下列材料进行分析,并回答问题:《唐律疏议,名例律》规定:“诸共犯罪者,以造意为首,随从者减一等。若家人共犯,止坐尊长,侵损于人者,以凡人首从论。即共监临主守为犯,虽造意者,仍以监守为首,凡人以常从论……即共犯谋反、谋大
表达式Abs(-5)+Len(“ABCDE”)的值是()。
最新回复
(
0
)