2017公共英语二级阅读文章《冰山》
冰山是一块大若山川的冰，脱离了冰川或冰架，在海洋里自由漂流。 冰山非常结实，加之极地的低温环境下金属的强度降低，很容易损坏金属板，因此为极地海洋运输中的极端危险因素。下面，小编为大家送上一篇2017公共英语二级阅读文章，我们一起去了解一下这座危险的冰山吧。
Icebergs
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 case 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, sunlight 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 of 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 snowflakes slowly to lose their feathery points and become tiny grains of ice. When new snow fell on top of the old, it too 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.
冰山
冰山是大自然最壮观的创造之一，但大多数人却从未看到过冰山，一种朦胧神秘的气氛笼罩着它们。冰山形成于久远的、寒冷的水体中，而且伴随着雷声轰鸣般的嘈杂和水花汹涌的风暴，但却无人耳闻目睹。冰山仅存在短短的一段时间就慢慢地悄无声息地融化掉。
冰山具有最纯粹的美，人们如是说。冰山呈现出千姿百态，可能白得耀眼，或者是闪耀着蓝色、绿色或紫色的玻璃般的光芒，或浓或淡。它们在平静的阳光照耀的海水中显得优雅堂皇，令人浮想联翩。
但是人们亦把冰山称为恐怖的和危险的。它们的确如此——在夜间，雾天和风暴肆虐时。即便是在晴朗的天气里，与它们保持一段安全距离也是明智的。冰山的大部分体积稳藏于水下，因此其水下部分的伸展远远超过可见的顶部。冰山也可能出人意料地翻滚，剧烈地搅动周围的水体。
冰山是冰川的一部分，从冰川断裂漂流进水中，一段时间后融化。今天的冰山由多年前降落的雪花形成。它们的体内是数百年，或数千年，有时甚至是数百万年前的降雪。这些雪花落在极地或寒冷的山上，仅有少量融化或根本不融化，这样经过许多年或许多世纪后积累了巨大的'深度。
由于每年的雪花积累在表面之上，蒸发和融化使得雪花慢慢失去其羽状尖端而变成微小的冰粒。当新的雪花降落到旧的表面上，也变成了冰粒。因而雪花覆盖层和冰粒层层堆积起来直到如此之大的厚度以致较上层的重量压缩较下层。在时间和压力的作用下，许多小冰粒结合到一起变成更大的晶体，最终较底层的晶体合并成庞大而坚固的冰块。
附：公共英语二级阅读技巧
(1)先看题干，带着问题读文章
阅读题干，首先要掌握问题的类型，分清是客观信息题还是主观判断题。客观信息题可以从文章中直接找到答案;而主观判断题考查的是对文章的感情基调、作者未加陈述的观点以及贯穿全文的中心主旨的理解等，这类题必须经过对作者的态度、意图以及对整篇文章进行深一层的推理才能解答。
其次，这一步骤中应把短文后的所有题干都看到，做到心中有数，并且暂时不看选择项(除要求判断说法是否符合原文的题目外)，以免受选择项干扰，然后有针对性地对文章进行扫读。此法加强了阅读的针对性，提高了做题的准确率，节省了时间。特别适用于对图形表格类阅读材料。
(2)深层理解题，比较各题
答完题后，要进行复查，复查时可以先读短文后检验答案，也可以把答案与短文对照起来检查。复查的方法主要有二：
看按已有的理解，作者的观点、方式、态度、情感等方面是否存在不一致或相互矛盾之处。在实际阅读中，有时作者并未把意图说出来，阅读者要根据字面意思，通过语篇逻辑关系，研究细节的暗示，推敲作者的态度，理解文章的寓义。
这就是通常所说的深层理解。如果我们对文章的理解是正确的，这种忠实于原文;以文章提供的事实和线索为依据的深层理解应该会在文中得到多处应证，至少也是不出现矛盾。
看通篇各个测试点有无联系，有无矛盾。
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