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
49
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.
【R3】
选项
答案
G
解析
前一句讲了居民们认为尽管火山活动频繁,但是它还表现得相对友善。G句讲到:“尽管火山一直在活动,但在近百年中并没有大的突然的喷发。”与前一句连接很紧密,是前一句的进一步的补充说明。
转载请注明原文地址:https://jikaoti.com/ti/CKHsFFFM
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
HereisanadvertisementaboutforacertainpositioninthenewspaperofDec.7,2005.Readtheadvertisementandcompletethe
ReadthefollowingpassageandchoosethecorrectanswerfromA,B,CandD.AtthetimeJaneAustin’snovelswerepublished
Readthefollowingarticleandanswerquestions9~18onthenextpage.Happy75thBirthday,SocialSecurit
InBritain,agreementsforinvitingandentertainingguestataweddingareusuallytheresponsibilityofthebride’sfamily.In
Experimentshaveshownthatinselectingpersonnelforajob,interviewingisatbestahindrance,andmayevencauseharm.Thes
ThenumberofspeakersofEnglishinShakespeare’stimeisestimatedtohavebeenaboutfivemillion.Todayitisestimatedthat
Asregardssocialconventions,wemustsayawordaboutthewell-knownEnglishclasssystem.Thisisanembarrassingsubjectfor
1.Ancientpeoplemadeclaypotterybecausetheyneededitfortheirsurvival.Theyusedthepotstheymadeforcooking,storing
Thefunctionoftheofficeistoperformadministrativework.First,itmustprovidethenecessarycommunicationswithcustomers
Readthefollowingpassageandanswerquestions9-18.1.FromDr.R.S.ScorerofBritain’sImperialCollegeoftheSciencecomes
随机试题
有以下程序:#include<stdio.h>main(){intsum=10,n=1;while(n<3){sum=sum—n;n++;}printf("%d,%d",n,sum);}
防民之口,甚于防川。川壅而溃,伤人必多。
A.分泌性腹泻B.渗透性腹泻C.渗出性腹泻D.动力性腹泻E.吸收不良性腹泻胃泌素瘤所致腹泻属于
有关肾区疼痛.下列哪项不正确?
“氨基糖苷类联用呋塞米导致肾、耳毒性增加”显示药源性疾病的原因是()。
根据《中国执业药师职业道德准则适用指导》,执业药师应当
关于承运人权利和义务的说法正确的是:
双亲杂交后,从母本植物上得到的种子以及由该种子长成的植株称杂种一代。()
将19分解成3个不重复数字(1至9)之和(不计顺序)的方法共有______种。
A、HewillgotoCanadaforvacation.B、Hewilljuststayathome.C、Hewilldosometemporaryjobtoearnsomemoney.D、Hewill
最新回复
(
0
)