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
You should spend about 20 minutes on Questions 14-26 which are based on Reading Passage 2 below. THE LOST CITY Thanks to modern
You should spend about 20 minutes on Questions 14-26 which are based on Reading Passage 2 below. THE LOST CITY Thanks to modern
admin
2015-05-04
29
问题
You should spend about 20 minutes on Questions 14-26 which are based on Reading Passage 2 below.
THE LOST CITY
Thanks to modern remote-sensing techniques, a ruined city in Turkey is slowly revealing itself as one of the greatest and most mysterious cities of the ancient world. Sally Palmer uncovers more.
A The low granite mountain, known as Kerkenes Dag, juts from the northern edge of the Cappadocian plain in Turkey. Sprawled over the mountainside are the ruins of an enormous city, contained by crumbling defensive walls seven kilometers long. Many respected archaeologists believe these are the remains of the fabled city of Pteria, the sixth-century BC stronghold of the Medes that the Greek historian Herodotus described in his famous work The Histories. The short-lived city came under Median control and only fifty years later was sacked, burned and its strong stone walls destroyed.
B British archaeologist Dr Geoffrey Summers has spent ten years studying the site. Excavating the ruins is a challenge because of the vast area they cover. The 7 km perimeter walls run around a site covering 271 hectares. Dr Summers quickly realised it would take far too long to excavate the site using traditional techniques alone. So he decided to use modern technology as well to map the entire site, both above and beneath the surface, to locate the most interesting areas and priorities to start digging.
C In 1993, Dr Summers hired a special hand-held balloon with a remote-controlled camera attached. He walked over the entire site holding the balloon and taking photos. Then one afternoon, he rented a hot-air balloon and floated over the site, taking yet more pictures. By the end of the 1994 season, Dr Summers and his team had a jigsaw of aerial photographs of the whole site. The next stage was to use remote sensing, which would let them work out what lay below the intriguing outlines and ruined walls. "Archaeology is a discipline that lends itself very well to remote sensing because it revolves around space," says Scott Branting, an associated director of the project. He started working with Dr Summers in 1995.
D The project used two main remote-sensing techniques. The first is magnetometry, which works on the principle that magnetic fields at the surface of the Earth are influenced by what is buried beneath. It measures localised variations in the direction and intensity of this magnetic field. "The Earth’s magnetic field can vary from place to place, depending on what happened there in the past," says Branting. "If something containing iron oxide was heavily burnt, by natural or human actions, the iron particles in it can be permanently reoriented, like a compass needle, to align with the Earth’s magnetic field present at that point in time and space." The magnetometer detects differences in the orientations and intensities of these iron particles from the present-day magnetic field and uses them to produce an image of what lies below ground.
E Kerkenes Dag lends itself particularly well to magnetometry because it was all burnt once in a savage fire. In places the heat was sufficient to turn sandstone to glass and to melt granite. The fire was so hot that there were strong magnetic signatures set to the Earth’s magnetic field from the time — around 547 BC — resulting in extremely clear pictures. Furthermore, the city was never rebuilt. "If you have multiple layers, it can confuse pictures, because you have different walls from different periods giving signatures that all go in different directions," says Branting. "We only have one going down about 1.5 meters, so we can get a good picture of this fairly short-lived city."
F The other main sub-surface mapping technique, which is still being used at the site, is resistivity. This technique measures the way electrical pulses are conducted through sub-surface soil. It’s done by shooting pulses into the ground through a thin metal probe. Different materials have different electrical conductivity. For example, stone and mudbrick are poor conductors, but looser, damp soil conducts very well. By walking around the site and taking about four readings per metre, it is possible to get a detailed idea of what is where beneath the surface. The teams then build up pictures of walls, hearths and other remains. "It helps a lot if it has rained, because the electrical pulse can get through more easily," says Branting. "Then if something is more resistant, it really shows up." This is one of the reasons that the project has a spring season, when most of the resistivity work is done. Unfortunately, testing resistivity is a lot slower than magnetometry. "If we did resistivity over the whole site it would take about 100 years," says Branting. Consequently, the team is concentrating on areas where they want to clarify pictures from the magnetometry.
G Remote sensing does not reveal everything about Kerkenes Dag, but it shows the most interesting sub-surface areas of the site. The archaeologists can then excavate these using traditional techniques. One surprise came when they dug out one of the fates in the defensive walls. "Our observations in early seasons led us to assume that we were looking at a stone base from a mudbrick city wall, such as would be found at most other cities in the Ancient Near East," says Dr Summers. "When we started to excavate we were staggered to discover that the walls were made entirely from stone and that the gate would have stood at least ten metres high. After ten years of study, Pteria is gradually giving up its secrets."
Questions 14-17
Reading Passage 2 has seven paragraphs, A-G.
Which paragraph contains the following information?
Write the correct letter, A-G, in boxes 14-17 on your answer sheet.
How the surface of the site was surveyed from above
选项
答案
C
解析
利用反向思维词“surveyed from above”可以推测这种侦测方法和天空、高空、太空等有关,于是可以很容易定位于原文C段落,这里很明显提及了用手持气球,甚至热气球从空中拍摄照片的方法,对应题目的“surveyed from above”,所以正确答案为C。
转载请注明原文地址:https://kaotiyun.com/show/cgNO777K
本试题收录于:
雅思阅读题库雅思(IELTS)分类
0
雅思阅读
雅思(IELTS)
相关试题推荐
Thedevelopmentofthesegenetechnologiesmaybefarinthefuture,butthemoralandsocialissuesraisedbythemshouldbedi
Feministcriticshaveoftenponderedwhetherapostmodernlanguagemaybearticulatedthatobviatestheessentialistarro
Onereasonwhyasheep,alesswell-understoodexperimentalsubjectthanthelaboratorymouse,shouldhaveprovedeasier
Wemustlearnto______sentencesandtoanalyzethegrammarofourtext,forthereisno______tothegrammarofpoetry,tothene
Whiletheambitiontodrawanimmediateconclusionis______,itisnotnecessarilycorrect,forthesearchforthetruthdepends
(Thispassagewaswrittenpriorto1950)Wenowknowthatwhatconstitutespracticallyallofmatterisemptyspa
Thenovelistdevotessomuchtimetoaviddescriptionsofhischaracters’clothesthatthereadersoonfeelsthatsuch______conc
Unenlightenedauthoritarianmanagersrarelyrecognizeacrucialreasonforthelowlevelsofseriousconflictamongmembersofd
WhetherthelanguagesoftheancientAmericanpeopleswereusedforexpressingabstractuniversalconceptscanbeclearlyanswer
随机试题
A.月经第5-6日刮宫见子宫内膜分泌反应B.经前2日刮宫见子宫内膜分泌反应不良C.经前3日刮宫见子宫内膜增生期改变D.经前2日刮宫见子宫内膜分泌期改变E.刮宫为蜕膜子宫内膜不规则脱落时.应为
男性,60岁,反复咳嗽、咳痰20年,近7~8年出现活动后气促,1周来病情加重。咳吐脓痰。体检:心率130次/分,三尖瓣区可闻收缩期吹风样杂音;双肺肺气肿征,有干、湿性哕音;肝于肋下3cm触及。质软有压痛,肝颈静脉回流征阳性;双下肢水肿。心电图:RV1+SV
肉苁蓉饮片的性状鉴别特征有
增值税的销售额为纳税人销售货物或提供应税劳务向购买方取得的全部价款和价外费用,但下列费用中不属于价外费用的有()。
甲企业2004年7月lB按面值发行5年期债券1007元。该债券到期一次还本付息,票面年利率为5%。甲企业2005年12月31日应付债券的账面余额为()万元。
以初中物理“重力”一课为例,简述三种新课导入的方法。
某人沿电车线路匀速行走,每12分钟有一辆电车从后面追上,每4分钟有一辆电车迎面开来。假设两个起点站的发车间隔是相同的,求这个发车间隔?()
上个世纪70年代,美国一个名叫洛伦兹的气象学家在解释空气系统理论时说,亚马逊雨林一只蝴蝶翅膀偶尔振动,也许两周后就会引起美国得克萨斯州的一场龙卷风,这就是所谓的“蝴蝶效应”。这说明()
Inthefollowingtext,somesentenceshavebeenremoved.ForQuestions41-45,choosethemostsuitableonefromthelist(A、B、C、
Theworld’sgreatestsnow-cappedpeaks,whichraninachainfromtheHimalayastoTianShanontheborderofChinaandKyrgyzst
最新回复
(
0
)