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
Japanese Drilling into Core of Earth In what resembles a journey to the center of the Earth, Japanese scientists have launched t
Japanese Drilling into Core of Earth In what resembles a journey to the center of the Earth, Japanese scientists have launched t
admin
2009-06-15
40
问题
Japanese Drilling into Core of Earth
In what resembles a journey to the center of the Earth, Japanese scientists have launched the world’s first attempt to bore a hole into the red-hot core of a volcano and unlock the secrets of deadly eruption.
A 50-meter-high oil-rig-like derrick perched on the scrubby slopes of Japan’s Mount Unzen will begin drilling through the volcano’s crust next week in a bid to sample the magma bubbling below.
The aim is to study how the liquefied rock causes menacing gas buildup, said team leader Setsuya Nakata, of the University of Tokyo’s Earthquake Research Institute.
"Gassing is important because it controls the explosivity of eruptions," Nakata said. "The results can be expanded to anti-disaster research."
Mount Unzen, a wind-swept 1,486-meter dome on the southern island of Kyushu, is a perfect model. It erupted in 1991, showering avalanches of hot rocks over a nearby town, killing 43 people and leaving nearly 2,300 homeless. Another 11,000 people were evacuated from the area until 1995, when the volcano had stabilized.
The results are particularly important to a nation like Japan, where the meteorological agency monitors 20 dangerous peaks. Perhaps Japan’s most famous volcano is snowcapped Mount Fuji, which last erupted in 1707 and sprinkled Tokyo with ash.
The drilling on Mount Unzen will begin very soon from an altitude of 850 meters on its northwest slope. Scientists hope to tap a magma vent around sea level by August and extract a 200- meter-long core sample by summer 2004.
Boring into the glowing magma at that level would normally be impossible, because of its fiery 700 degree Celsius heat. Thus, a slurry of water will be pumped into the drill shaft to cool the magma and allow the drill head to cut through.
Nakata said there is no danger of triggering another eruption.
选项
A、erupted in 1707.
B、erupted in 1991.
C、erupted in 1995.
D、several times in the last century.
答案
B
解析
答案的根据在第五段。
转载请注明原文地址:https://kaotiyun.com/show/hDhd777K
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
JeanSibeliusandHisMusicJeanSibeliusfeltverymuchalonebecausehecouldn’tacceptthemusicofthatday.Hebelievedtha
A.CommonSecondaryLungCancersB.TheAdvantagesBroughtaboutbyRoutineChestCheckupC.RelationshipBetweenMortalityRate
Thestaffofthecompanyarealwayscourteousandhelpful.
ManyAmericanwomenhaveapoorknowledgeofcancer.MostAmericanwomenknowtoolittleabouthowtolowertheircancerrisk.
A.ThecauseofabadmoodB.WaystoraisemoodC.AerobicexercisecanraisemoodD.Tofixone’smoodE.Thereason
Inordertolivelonger,weshouldpostponetheprocessofaging.Themainideaofthispassageishowtolivelonger.
AAddressingaVarietyofBehavior-affectingFactorsBImportanceofImmunizationCRelationshipwithOtherHealthServicesD
BetterControlofTBSeenIfaFasterCureIsFoundTheWorldHealthOrganizationestimatesthataboutone-thirdofallpeop
MyLifeatRendaIlearnedveryquicklythatbeingateachingassistant(TA)attheUniversityofIowawouldbedifferentfro
MyLifeatRendaIlearnedveryquicklythatbeingateachingassistant(TA)attheUniversityofIowawouldbedifferentfro
随机试题
正常成人空腹血糖值为(邻甲苯胺法)
中心静脉压
甘味药的功效是苦味药的功效是
在下列关于圆弧形态的论述中,正确的有( )。
下列选项中不属于道教名山的是()。
船舶是人类发展史上伟大的发明之一。人类的祖先在与水打交道的实践中,发现了木头、树枝和落叶能够漂浮在水面上的自然现象。特别是在发生洪水灾害时,一些人在绝望的挣扎中偶然抓到一根漂浮的断木而绝处逢生的事实,使人们逐步认识了水的浮力性。人们开始有意识地利用木材、竹
“红军、游击队和红色区域的建立和发展。是半殖民地中国在无产阶级领导之下的农民斗争的最高形式,和半殖民地农民斗争发展的必然结果,并且无疑义地是促进全国革命高潮的最重要因素。”这段材料实质表明
某数据库中有员工关系E、产品关系P、仓库关系W和库存关系I,其中:员工关系E(employeeID,name,department)中的属性为:员工编号,姓名,部门:产品关系P(productID,name,model,size,color)中的属性为:产
有如下程序:#include(iostream)usingnamespacestd;classTestClass{protected:TestClass(){couti(cout<<‘x’;}TestC
A、$7600.B、$7000.C、$15000.D、$20000.B
最新回复
(
0
)