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
Icebergs are among nature’s most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops
Icebergs are among nature’s most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops
admin
2010-01-26
39
问题
Icebergs are among nature’s most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being—somewhere—in faraway, frigid waters, amid thunderous noise and splashing turbulence, which in most cases no one hears or sees. They exist only a short time and then slowly waste away just as unnoticed.
Objects of sheerest beauty, they have been called. Appearing in an endless variety of shapes, they may be dazzlingly white, or they may be glassy blue, green or purple, tinted faintly or in darker hues. They are graceful, stately, inspiring in calm, sunlit seas.
But they are also called frightening and dangerous, and that they are—in the night, in the fog, and in storms. Even in clear weather one is wise to stay a safe distance away from them. Most of their bulk is hidden below the water, so their underwater parts may extend out far beyond the visible top. Also, they may roll over unexpectedly, churning the waters around them.
Icebergs are parts of glaciers that break off, drift into the water, float about awhile, and finally melt. Icebergs afloat today are made of snowflakes that have fallen over long ages (ff time. They embody snows that drifted down hundreds, or many thousands, or in some cases maybe a million years ago. The snows fell in polar regions and on cold mountains, where they melted only a little or not at all, and so collected to great depths over the years and centuries.
As each year’s snow accumulation lay on the surface, evaporation and melting caused the snow flakes slowly to lose their feathery points and become tiny grains of ice. When new snow fell on top of the old, it turned to icy grains. So blankets of snow and ice grains mounted layer upon layer and were of such great thickness that the weight of the upper layers compressed the lower ones. With time and pressure from above, the many small ice grains joined and changed to larger crystals, and eventually the deeper crystals merged into a solid mass of ice.
The icebergs are rarely seen because ______.
选项
答案
they are located in remote regions of the world
解析
转载请注明原文地址:https://kaotiyun.com/show/2wdK777K
0
大学英语六级
相关试题推荐
A、Weatherforecastisgettingmoreaccuratetoday.B、Peoplecanpredicttheweatherbytheirsenses.C、Whoaretherealexperts
Whatisthepassagemainlyabout?Whentwoheavypeoplegetmarried,chancesoftheirchildrengettingfatincrease,becauseob
A、ShewillwaitforTomandgotothepostofficetogether.B、Shewilldropsomelettersinthemailboxonherwayhome.C、She
Inthe17thcentury,awriterexplainedthetheoryaboutthefunctionoflaughtersupportedbymostpeople.A"goodmixer"who
Inthe17thcentury,awriterexplainedthetheoryaboutthefunctionoflaughtersupportedbymostpeople.Achimpanzeeoccasi
Surroundedbythepolice,thekidnappers____________________________(没有选择只能当场投降).
Therearevariouswaysinwhichindividualeconomicunitscaninteractwithoneanother.Threebasicwaysmaybedescribedasth
A、Hethoughtthenativesweremad.B、Hedidn’ttakeitseriously.C、Hecalledinapolicemantotalkwiththenatives.D、Hebeli
NewsthatpoliceinLeedsarelookingforanAmericanintheirsearchforthemanwhomurderedoneoftheircolleaguesonBoxing
SomeoftheconcernssurroundingTurkey’sapplicationtojointheEuropeanUnion,tobevotedonbytheEU’sCouncilofMinister
随机试题
《________》是清代纪晓岚的文言短篇笔记小说。
建设投资包括()。
《安全生产法》规定,生产经营单位的主要负责人对本单位安全生产工作()。
汉译英:“货物、商品、展示”。()
我国的外汇储备中,()所占比重较低。
以下关于下岗失业人员小额担保贷款对象的说法中,错误的是()。
若x4-ax3+bx2+2x-4能被x2-3x+2整除,则ab=().
偏头痛一直被认为是由食物过敏引起的。但是,我们让患者停止食用那些已经证明会不断引起过敏性偏头痛的食物,他们的偏头痛并没有停止。因此,显然存在别的某种原因引起偏头痛。下列哪项,如果是真的,最能削弱上面的结论?
RUP是信息系统项目的生命周期模型之一,“确保软件结构、需求、计划足够稳定;确保项目风险已经降低到能够预计完成整个项目的成本和日程的程度。针对项目的软件结构上的主要风险已经解决或处理完成”是该模型(25)阶段的主要任务。
Sexprejudicesarebasedonandjustifiedbytheideologythatbiologyisdestiny.【C1】______tothisideology,basicbiological
最新回复
(
0
)