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
83
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.
【R4】
选项
答案
C
解析
这一段介绍了Etna火山的起源,C句讲了火山名称的由来,后面讲述了历史上火山的一些喷发过程。
转载请注明原文地址:https://kaotiyun.com/show/cX9d777K
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
JohnWilliams,PersonnelDirectorofacompany,receivesanapplicationfromJackSmithapplyingforapositioninthecompanyb
Readthefollowingpassageandchoosethebestwordforeachspace.Moneyspentonadvertisingismoneyspentaswellasany
Shootingmoltenrockmorethan500metersintotheair,Etnasentstreamsoflavarushingdownitsnortheasternandsouthernfla
Amulticulturalpersonissomeonewhoisdeeplyconvincedthatallculturesareequallygood.【R1】______Andmostlikelyhehasbe
Tradeiscentraltohumanhealth,prosperityandsocialwelfare.【R1】______Examplesoftradeindailylifearesoabundanttheys
InBritain,agreementsforinvitingandentertainingguestataweddingareusuallytheresponsibilityofthebride’sfamily.In
NolongerdomostofEurope’sundergraduateswanttodirtytheirhandsproducingthingsorprovidingservicestocustomers.【R1】_
Readthefollowingpassageandanswerquestions9-18.1.FromDr.R.S.ScorerofBritain’sImperialCollegeoftheSciencecomes
ADoctorintheHouseBrushingyourteethtwiceadayshouldkeepthedentistaway.Butifagroupofscientificresearchers
ADoctorintheHouseBrushingyourteethtwiceadayshouldkeepthedentistaway.Butifagroupofscientificresearchers
随机试题
有治法而后有治人
打开Excel2010工作窗口,在工作表窗口底部显示“sheetI”、“sheet2”和“sheet3”,它们被称为________________。
在中国,引起慢性肾功能不全的疾病次序是
在履行医学伦理学基本原则中的尊重原则时,重点内容不含有
抗震等级为二级的框架结构,一般情况下柱的轴压比限值为:
下列选项中,()为控制性详细规划编制的内容。
资产评估的经济技术原则包括()。
关于期货业协会的自律性管理,下列说法正确的是()。
下列选项中,影响行业的因素有()。
A、Itscanalsmakeitsink.B、Thesealevelrisesup.C、Naturaldisastersoffloodkeepattackingthecountry.D、Thedrinkingwat
最新回复
(
0
)