托福阅读否定事实信息题是阅读考试十大题型之一，通常每篇阅读中都会出现;tpo是托福阅读备考最权威的材料，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的否定事实信息题及其对应的解析，供大家参考使用。本文带来的是TPO15-1的否定事实信息题，一起来看看吧。
TPO15-1 Glacier Formation
Paragraph1
Glaciers are slowly moving masses of ice that have accumulated on land in areas where more snowfalls during a year than melts. Snowfalls as hexagonal crystals, but once on the ground, snow is soon transformed into a compacted mass of smaller, rounded grains. As the air space around them is lessened by compaction and melting, the grains become denser. With further melting, refreezing, and increased weight from newer snowfall above, the snow reaches a granular recrystallized stage intermediate between flakes and ice known as firn. With additional time, pressure, and refrozen meltwater from above, the small firn granules become larger, interlocked crystals of blue glacial ice. When the ice is thick enough, usually over 30 meters, the weight of the snow and firn will cause the ice crystals toward the bottom to become plastic and to flow outward or downward from the area of snow accumulation.
2.According to paragraph 1, which of the following does NOT describe a stage in the development of firn?
○Hexagonal crystals become larger and interlock to form a thick layer.
○Snow crystals become compacted into grains.
○Granules recrystallize after melting, refreezing, and further compaction.
○Grains become denser owing to reduced air space around them.
解析：EXCEPT题，排除法。A的hexagonal crystal做关键词定位至第二句，但原文没说形成thick layer，A错，选;B的compact和grain做关键词同样定位至第二句，正确，不选;C的granules做关键词定位至倒数第三句，正确，不选;D的air space做关键词定位至第三句，正确，不选
[1]冰川就是缓慢移动的巨大冰块，这种冰块是由于每年降雪量大于融雪量不断积累形成于陆地的。雪花降落时是六角晶体，可一旦落在地面，雪花就迅速凝结成大量小而圆的颗粒。由于凝结和融化这些颗粒周围空气空间也随之减少，从而颗粒就会变得更为紧密。雪继续融化、再结冰，并且还要承受上方新的积雪增加的重量，待这些积雪达到一种介于冰片与冰之间的阶段，颗粒物便会再次形成晶状体，这一阶段被称作积雪过程。时间、压力不断增加，并且位于上方的融雪重新结冰，那些较小的积雪颗粒开始变大且与透明的蓝色冰层连结。当这些冰块足够厚(一般是30米以上)，积雪的重量就会使底部的冰晶变得具有可塑性，会从有积雪的地方流入或者流出。
Paragraph 2:
Glaciers are open systems, with snow as the system's input and meltwater as the system' s main output. The glacial system is governed by two basic climatic variables: precipitation and temperature. For a glacier to grow or maintain its mass, there must be sufficient snowfall to match or exceed the annual loss through melting, evaporation, and calving, which occurs when the glacier loses solid chunks as icebergs to the sea or to large lakes. If summer temperatures are high for too long, then all the snowfall from the previous winter will melt. Surplus snowfall is essential for a glacier to develop. A surplus allows snow to accumulate and for the pressure of snow accumulated over the years to transform buried snow into glacial ice with a depth great enough for the ice to flow. Glaciers are sometimes classified by temperature as faster-flowing temperate glaciers or as slower-flowing polar glaciers.
5.According to paragraph 2, surplus snow affects a glacier in all the following ways EXCEPT:
○It provides the pressure needed to cause glacial ice to flow.
○It offsets losses of ice due to melting. evaporation, and calving.
○It brings about the formation of fern in the snow it buries.
○It results in temperate glaciers that are thicker than polar glaciers.
解析：EXCEPT题，排除法。A的pressure做关键词定位至倒数第二句，正确，不选;B的三个动名词和做关键词定位至第二句，正确，不选;C的firn做关键词定位至前一段的倒数第三句，正确，不选;D的两种glaciers做关键词定位至最后一句，两者是并列关系，没有谁比谁怎么样，所以D错，选
[2]冰川是开放的系统，降雪是该系统的补给水源，融雪是该系统的主要输出水源。冰川系统受两个基本气候变量控制：降水和气温。要保持或增加冰川的体积，就必须具备足够的降雪量，以抵消或者超过每年因融雪、蒸发或者以海洋和湖泊中的冰山形式的裂冰的数量。如果夏季温度持续长时间的高温度，上一个冬季所有的降雪都会融化。剩余降雪对形成冰川非常重要。有剩余的积雪就能够积累，并且由于多年积雪形成的压力，将积雪转化为流动冰，深度足以保证冰川流动。按照温度分类，冰川可分为快速流动温带冰川和慢速流动极地冰川。
Paragraph3
Glaciers are part of Earth's hydrologic cycle and are second only to the oceans in the total amount of water contained. About 2 percent of Earth's water is currently frozen as ice. Two percent may be a deceiving figure, however, since over 80 percent of the world's freshwater is locked up as ice in glaciers, with the majority of it in Antarctica. The total amount of ice is even more awesome if we estimate the water released upon the hypothetical melting of the world's glaciers. Sea level would rise about 60 meters. This would change the geography of the planet considerably. In contrast, should another ice age occur, sea level would drop drastically. During the last ice age, sea level dropped about 120 meters.
9.The discussion in paragraph 3 answers all the following questions EXCEPT:
○Where is most of Earth's freshwater?
○What effect would a new ice age have on sea levels?
○What is the total amount of water in Earth's oceans?
○How much of Earth's water is in ice?
解析：EXCEPT题，排除法。A的freshwater做关键词定位至第三句，原文说80%，肯定是最大来源了，所以A对，不选;B的ice age和sea level做关键词定位至最后两句，正确，不选;C的total amount在原文没有对应点，错，选;D的ice和Earth’s water做关键词定位至第二句，正确，不选
[3]冰川是地球水循环的一部分，水容量仅次于排名第一的海洋。目前地球上大约有2%的水源处于冰冻状态。2%这个数字可能并不属实，因为全球有超过80%的淡水以冰块的形态存在于冰川中，其中大部分处于南极洲。如果我们估算出全球冰川融化后所释放的水量，储水量必定让人叹为观止。海平面将会上升60米左右。这会显著的改变地球的地理属性。相反，如果另一个冰期到来，海平面会迅速降低。在上一个冰期，海平面下降了120米左右。
以上就是托福阅读TPO15-1中的否定事实信息题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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