首页
登录
职称英语
Icebergs are among nature’s most spectacular creations, and yet most people
Icebergs are among nature’s most spectacular creations, and yet most people
游客
2024-06-11
46
管理
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. [br] 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://tihaiku.com/zcyy/3629860.html
相关试题推荐
Mostpeoplewouldbe【S1】bythehighqualityofmedicine【S2】tomostAmeric
[audioFiles]audio_eusm_j01_127(20099)[/audioFiles]A、Howprimitivepeopleusedf
Themorepeopleyourchildencounters,_____________________________(他越有可能遇上喜欢他
[originaltext]Thehomeisthecentralfocusofmostyoungpeople’slivesin
[originaltext]Thehomeisthecentralfocusofmostyoungpeople’slivesin
[originaltext]Thehomeisthecentralfocusofmostyoungpeople’slivesin
Theauthorthinksthatpeopleare______.[br]Present-daysocietyismuchfreer
Mostpeopledon’tenjoyfacingthedifficultsituationsthatsometimesoccur
[originaltext]TherearepeopleinItalywhocan’tstandsoccer.NotallCana
[originaltext]TherearepeopleinItalywhocan’tstandsoccer.NotallCana
随机试题
【L1】______and【L2】______affecthowpeoplevaluepersonalcontrolindecision
THETRANSPORTATIONREVOLUTION1Bythecloseoftheeighteent
InAmericanIncomeLifeInsuranceCompany(AIL),salesrepresentativeshave
[originaltext]Moderator:WelcometoLeadershipInsider.Itisanonlinecou
Dr.DonaldSadowayatMITstartedhisownbatterycompanywiththehopeofc
运行正点率、到站正点率、发车正点率体现了运输产品竞争力中的()A.迅速性
图示某地区岩层时代为奥陶纪和石炭纪,其地层接触关系为: A.整合接触B.
假设某投资者在2013年12月31日,买入1股A公司股票,价格为100元,201
一平面简谐波沿x轴正向传播,已知P点(xp=L)的振动方程为y=Acos(ωt+
甲将自己收藏的一幅名画卖给乙,乙当场付款,约定5天后取画。丙听说后,表示愿
最新回复
(
0
)