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
2023-09-14
56
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:http://tihaiku.com/zcyy/3013594.html
相关试题推荐
[originaltext]Ourenvironmentisbeingpollutedfasterthannatureandman’
[originaltext]Ourenvironmentisbeingpollutedfasterthannatureandman’
Itisourdutyto______(帮助偏远地区的人民摆脱贫困).helpthepeopleinremoteplacesoutofp
[originaltext]Theyoungpeoplewhotalkofthevillageasbeing"dead"are
[originaltext]Theyoungpeoplewhotalkofthevillageasbeing"dead"are
Whatdoesitmeanby"hehadtoeathiswords"(Para.1)?[br]Peoplecanfindev
FewpeopleknowthatMr.PotatoHeadwasalmostlittlemorethanaforgotten
Let’slookbackinhistorytoanearlierwayoflife.Atonetime,peopledi
Peopleusetheword"unidentified"todescribethereportedflyingobjectsbecau
Peopleusetheword"unidentified"todescribethereportedflyingobjectsbecau
随机试题
Whydidn’tthemancallthewoman?[br][originaltext]Woman:Youdidn’tcallla
Verysoon,unimaginablypowerfultechnologieswillremakeourlives.Thisco
目前控制支气管哮喘急性发作的首选药物是A.B2受体激动剂 B.抗胆碱能药物
基底岩层稳固,由于岩土物料的性质、排土工艺及其他外界条件(如外载荷和雨水等)所导
土的强度实质上是土的抗剪强度,下列有关抗剪强度的叙述正确的是()。A.砂土
Thechangeinthatvillagewasmiraculou
考评者培训的内容:
与现货市场投机相比,期货市场投机的重要区别表现在()。A:有效缓解市场价格波动
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
军团菌感染应首选A.氯霉素 B.青霉素 C.红霉素 D.链霉素 E.庆大
最新回复
(
0
)