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
Mount Rainier, the highest mountain in Washington State, reaches to more than 14 410 feet (4 392 meters) above sea level. Though
Mount Rainier, the highest mountain in Washington State, reaches to more than 14 410 feet (4 392 meters) above sea level. Though
admin
2012-01-14
73
问题
Mount Rainier, the highest mountain in Washington State, reaches to more than 14 410 feet (4 392 meters) above sea level. Though it is a dormant volcano (having last erupted 150 years ago) encased in over 35 square miles of snow and ice. steam vents in the summit craters suggest the volcano is not extinct. Even though it was built up to its towering height above the surrounding country by repeated eruptions and successive flows of hot lava, it is the slow and unstoppable power of glacial ice that is now reshaping it.
Glaciers are essentially accumulations of snow that has not melted from year to year. As the snow accumulates, its weight presses the air out from between the crystals and packs the snow down tight, compressing it to a sponge-like, porous ice called firn or neve. Each year as a new layer of snow is added, the lower layers are compressed more and more, becoming harder and harder until finally the lower layers become as hard as ordinary ice. Then gravity pulls the ice down the mountainside, both scouring and smoothing the bedrock underneath it as it moves. The seasonal freezing and thawing breaks rocks from adjacent slopes, which then fail onto the glacier’s surface. The passing ice carries the debris away. Thus, what has been created by fire is destroyed by ice.
A particularly amazing feature of Mount Rainier is the ice caves that are scattered along its flanks. They are formed when small grottos are melted out along the sides of the glacier. Rainier’s two ice-filled summit craters each support a network of ice caves which arc carved by heat and volcanic emissions from deep inside the mountain. This happens when the firn ice created from the continual accumulation of snow in the summit craters starts to melt from the heat that rises along the crater walls of the volcano. The currents of warm air melt chambers between the rock walls of the mountain and the firn ice. As the process continues, a complex network —a maze -of large caves and tunnels is created throughout the interior of the crater.
This whole process depends on maintaining a rather delicate balance. In order for the process to continue, enough snow must fall each year to fill the craters and replace the ice that has melted underneath. But, if too little heat is emitted, and the snow steadily accumulates, then the ice will expand, pushing itself against the crater walls and filling the caverns with ice. On the other hand, if more steam is emitted than the amount of firn created, the ice pack will melt away, destroying the ice caves. It is in this manner that Mount Rainier s huge Paradise Ice Caves melted away in the 19th century. (459 words)
Which of the following is NOT true according to the passage?
选项
A、Paradise Ice Caves used to be in Mount Rainier.
B、The seasonal freezing and thawing can break rocks.
C、Some dormant volcanoes can erupt.
D、Firn is like a sponge, soft to touch.
答案
D
解析
粒雪像海绵状,只是表现在多孔方面;粒雪不像海绵那样摸上去很软。
转载请注明原文地址:https://kaotiyun.com/show/Qi6O777K
0
考博英语
相关试题推荐
Thecritic’sassessmentofthebookisthatitisbeautifullywritten.
Atthefall2001SocialScienceHistoryAssociationconventioninChicago,theCrimeandJusticenetworksponsoredaforumonth
Atthefall2001SocialScienceHistoryAssociationconventioninChicago,theCrimeandJusticenetworksponsoredaforumonth
Heislookingforajobthatwillgivehimgreater______forcareerdevelopment.
Cheaplabor(scarcitywas)inthecottonplantations(ofthe)AmericanSouth,and(slaves)became(standard)practice.
PerhapsthemosttypicallyAmerican(types)offeaturemovie,thewestern,(hasbeen)aresurgence(in)popularity(inrecentye
(Contraryto)theopinionofthecommitteemembers,thechairmaninsisted(on)appointing(whomever)hethoughtcoulddothejob
Ⅱ.Direction:ReadthefollowingpassagecarefullyandthenexplaininyourownEnglishtheexactmeaningofthenumberedandun
Ifthestraggleforasustainablesociety______,wemusthavesomevisionofwhatweareaimingfor.
Becauseofrecentpoliticalandeconomicupheavalsinthesecountries,itseemslikelythatthetrendwillbetowarddecentraliz
随机试题
用人单位延长劳动者工作时间应受《劳动法》有关限制性规定的约束的情形是()
某女,32岁,心悸气短半年余。半年前小产后心悸气短,伴头晕失眠,倦怠乏力,饮食减少,时有便溏,每遇过劳则发。若兼汗出肢冷,可加
男性,50岁,气短进行性加重1年,刺激性干咳3个月入院。体检:心肺无阳性征。X线胸片显示双肺纹理增多呈网状。肺功能测定:肺活量降低,一秒用力呼气容积(FEV1)正常,肺弥散量降低。本例最可能的诊断为
背景资料:某办公楼由12层主楼和3层辅楼组成。施工单位(乙方)与建设单位(甲方)签订了承建该办公楼的施工合同,合同工期为41周。合同约定,工期每提前(或拖后)1d奖励(或罚款)2500元。乙方提交了粗略的施工网络进度计划,并得到甲方的批准。该网络进度计划
下列施工进度控制措施中,属于组织措施的是()。
不符合政府质量监督人员应具备条件的是()。
如果个体在团体中工作不如单独工作那样努力,团体的规模越大,每个人付出的努力相对越小,把这种个体在组织中努力水平下降的现象叫做()。
导游语言的运用四原则是()。
劳动定额管理的首要环节是()。
人民警察的(),不仅指人民警察必须具有相应的文化程度(学历),而且要求人民警察具有良好的文化修养。
最新回复
(
0
)