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
Shooting molten rock more than 500 meters into the air, Etna sent streams of lava rushing down its northeastern and southern fla
Shooting molten rock more than 500 meters into the air, Etna sent streams of lava rushing down its northeastern and southern fla
admin
2017-04-21
74
问题
Shooting molten rock more than 500 meters into the air, Etna sent streams of lava rushing down its northeastern and southern flanks. The eruption was accompanied by hundreds of earthquakes measuring up to 4.3 on the Richter scale. As a huge plume of smoke and ash drifted across the Mediterranean Sea, residents of Linguaglossa(the name means "tongues" of lava)tried to ward off the lava flows by parading a statue of their patron saint through the town’s streets.【R1】______. But the episode was unnerving because it was so similar to an erratic eruption on the volcano’s southern flank in the summer of 2001 that destroyed parts of a tourist complex and threatened the town of Nicolosi. Some of the lavas discharged in both events were of an unusual type last produced in large amounts at the site about 15,000 years ago.【R2】______.
The Sicilians living near Mount Etna have long regarded the volcano as a restless but relatively friendly neighbor.【R3】______. But now some researchers believe they have found evidence that Etna is very gradually becoming more dangerous. It is unlikely that Etna will explode like Mount Saint Helens in the near future, but fierce eruptions may become more common.
【R4】______. Extensive reports and legends record about 3,000 years of the volcano’s activity, but a reliable chronicle has been available only since the 17th century. Most of the earlier accounts are limited to particularly violent eruptions, such as those occurring in 122 B.C. and A.D. 1169, 1329, 1536 and 1669. During the eruption in 1669, an enormous lava flow buried part of the city of Catania before pouring into the sea.
With a surface area of approximately 1,200 square kilometers, Etna is Europe’s largest volcano. Its 3,340-meter-high peak is often covered with snow.【R5】______. Blocks of this material are occasionally caught in the magma — the molten rock moving upward—and ejected at the surface. Numerous blocks of white sandstone were blown out during the 2001 and 2002 eruptions. This phenomenon occurs whenever magma must open new paths for its ascent, as is usually the case with lateral eruptions(those that occur on the volcano’s flanks).
The volcano is more than 500,000 years old. Remnants of its earliest eruptions are still preserved in nearby coastal regions in the form of pillow lavas, which emerge underwater and do in fact look like giant pillows.【R6】______. Today a much steeper cone rests on the ancient shield volcano. It consists of at least five generations of volcanic edifices that have piled up during the past 100,000 to 200,000 years, each atop the remnants of its eroded or partly collapsed predecessor.【R7】______. Among Etna’s special features are the hundreds of small cinder cones scattered about its flanks. Each marks a lateral outbreak of magma.【R8】______.
A. Only the upper 2,000 meters consists of volcanic material; the mountain rests on a base of sedimentary rock beds.
B. Perhaps because of divine intervention, nobody was hurt and damage was not widespread.
C. The name of "Etna" is derived from an old Indo-Germanic root meaning "burned" or "burning".
D. At first, a shield volcano — so called because it resembles a shield placed face-up on the ground — grew in a depression in the area where Etna now stands.
E. One of the world’s most productive volcanoes, Etna has spewed about 30 million cubic meters of igneous material each year since 1970, with a peak eruption rate of 300 cubic meters a second.
F. At that time, a series of catastrophic eruptions led to the collapse of one of Etna’s predecessor volcanoes.
G. Though persistently active, Etna has not had a major explosive eruption — such as the devastating 1980 event at Mount Saint Helens in Washington State — for hundreds of years.
H. The present-day cone has been built in the past 5,000 to 8,000 years.
【R6】
选项
答案
D
解析
前一句讲了很早以前一些火山喷发后所留下的痕迹。D句意为:“一个盾状的火山矗立在现在Etna火山所在的凹陷处”。此句承接了前一句,前后连接紧密,因此D为正确答案。
转载请注明原文地址:https://kaotiyun.com/show/MX9d777K
本试题收录于:
BFT阅读题库国际化人才外语考试(BFT)分类
0
BFT阅读
国际化人才外语考试(BFT)
相关试题推荐
HereisanadvertisementaboutaBusinessBookClub.Readtheadvertisementandcompletethegiveninformationform.Wri
YougotaletterfromJimGreen,apersonworkingatthemarketingdepartmentofacompany.
Readthefollowingarticleandanswerquestions9~18onthenextpage.Happy75thBirthday,SocialSecurit
Readthefollowingpassageandchoosethebestwordforeachspace.Moneyspentonadvertisingismoneyspentaswellasany
Amulticulturalpersonissomeonewhoisdeeplyconvincedthatallculturesareequallygood.【R1】______Andmostlikelyhehasbe
Tradeiscentraltohumanhealth,prosperityandsocialwelfare.【R1】______Examplesoftradeindailylifearesoabundanttheys
NolongerdomostofEurope’sundergraduateswanttodirtytheirhandsproducingthingsorprovidingservicestocustomers.【R1】_
Thepurposeoftheexperimentswastofundouthowtheclockworks.Hamstershavesleepingproblems.
Thepurposeoftheexperimentswastofundouthowtheclockworks.SCNplaysaroleindailyrhythms.
Thepurposeoftheexperimentswastofundouthowtheclockworks.theidentificationoftheinternalclockmayhelptoreliev
随机试题
Whichofthefollowingsentencesdoesnotincludeanindependentgenitiveconstruction?
国家行政机关
休克病人的体位一般应采用()
对个人住房贷款楼盘项目的审查包括()。
信贷审批或信贷决策应遵循的原则不包括()。
一般资料:求助者,女性,19岁,大学生。下面是心理咨询师与求助者之间的一段咨询对话。心理咨询师:你好!请问我能为你提供什么帮助吗?求助者:我最近总感到紧张,睡不好觉。心理咨询师:你能谈谈是什么事情让你感到紧张,并出现
教师对学校或者其他教育机构侵犯其合法权益,或者对学校或者其他教育机构作出的处理不服的,可以向教育行政部门提出申诉,教育行政部门应当在接到申诉的()作出处理。
依次填入下面文字十横线处的关联词语,恰当的一组是______。______任何生物的活动都有时间上的周期性节奏,______宇宙飞船中宇航员的活动也要符合地球上昼夜循环的规律。______他们在密封舱里,没有习以为常的昼夜交替,______要通过仪
求极限.
______dealswiththerelationshipbetweenthelinguisticelementandthenonlinguisticworldofexperience.
最新回复
(
0
)