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TPO24-1的否定事实信息题，一起来看看吧。
TPO24-1 Lake Water
Paragraph 6
A given lake’s residence time is by no means a fixed quantity. It depends on the rate at which water enters the lake, and that depends on the rainfall and the evaporation rate. Climatic change (the result of global warming?) is dramatically affecting the residence times of some lakes in northwestern Ontario, Canada. In the period 1970 to 1986, rainfall in the area decreased from 1,000 millimeters to 650 millimeters per annum, while above-average temperatures speeded up the evapotranspiration rate (the rate at which water is lost to the atmosphere through evaporation and the processes of plant life).
The result has been that the residence time of one of the lakes increased from 5 to 18 years during the study period. The
slowing down of water renewal leads to a chain of further consequences; it causes dissolved chemicals to become increasingly concentrated, and this, in turn, has a marked effect on all living things in the lake.
12. According to paragraph 6, residence time is affected by all of the following EXCEPT
A. amount of rainfall
B. rate of evaporation
C. temperature of surrounding air
D. concentration of chemicals in lake water
解析：EXCEPT题，排除法。A的rainfall，B的evaporation和C的temperature做关键词都可以定位至第四句，都正确，不选;而D的chemicals做关键词定位至最后一句，但chemical的浓度是renewal减慢带来的影响，不是residence time的决定因素，错，选。而且根据上题也可以直接得出这道题的答案是D
[6]给定的湖泊的停留时间绝不是一个确定的值。它取决于水流进湖的速度，而这个速度取决于降雨量和蒸发速度。气候变化(全球变暖的结果?)严重影响着加拿大安大略湖西北部一些湖泊的停留时间。在1970年到1986年间，这个地区的降雨量由每年1 000毫米降到了650毫米，而同时平均温度的上升加快了蒸散率(这个速率指的是水蒸发到大气的速率以及植物生命的过程)。结果是，在研究期间其中一个湖的停留时间从5年增加到18年。湖水的更新变慢导致了一系列后果;它使得溶解的化学物质不断变浓，这样反过来会对湖中的生物造成显著的影响。
以上就是托福阅读TPO24-1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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