托福阅读笔记。说到托福阅读备考，TPO是必不可少的备考神器，通过TPO练习来更好的适应阅读考试的节奏。本文小编带来的是TPO24 Lake water的学习笔记，希望能够与正在备考的大家一起进步。
TPO24 Lake water
文章题材：自然学科——湖水
常见词汇：
spite [spait] n. 恶意，怨恨vt. 刁难，伤害
noticeable ['nəutisəbl] adj. 显而易见的
movement ['mu:vmənt] n. 活动，运动，移动，[音]乐章
illustrate ['iləstreit] v. 举例说明，(为书)作插图，图解
merely ['miəli] adv. 仅仅，只不过
quantity ['kwɔntiti] n. 量，数量，大量
enormously adv. 巨大地，庞大地;非常地，在极大程度上
constant ['kɔnstənt] adj. 经常的，不变的n. 常数，恒量
concentrated ['kɔnsentreitid] adj. 全神贯注的，浓缩的
pond [pɔnd] n. 池塘
易错题解析：
Paragraph 5: Residence times vary enormously. They range from a few days for small lakes up to several hundred years for large ones; Lake Tahoe, in California, has a residence time of 700 years. The residence times for the Great Lakes of North America, namely, Lakes Superior, Michigan, Huron, Erie, and Ontario, are, respectively, 190,100,22,2.5, and 6 years. Lake Erie’s is the lowest: although its area is larger than Lake Ontario’ s, its volume is less than one-third as great because it is so shallow-less than 20 meters on average.
9. Why does the author discuss the Great Lakes in paragraph 5?
○To demonstrate the extent to which residence times vary from lake to lake
○To illustrate how residence times are calculated for specific lakes
○To argue that the residence time of a lake increases with area
○To emphasize that Lake Tahoe' s residence time is unusually long
题型：修辞目的题。答案是(A)
解析：题干关键词为the Great Lakes。回归原文寻找关键信息The residence times for the Great Lakes of North America, namely, Lakes Superior, Michigan, Huron, Erie, and Ontario, are, respectively, 190,100,22,2.5, and 6 years.，具体信息的相关语句里在说五大湖的residence time都不同、有很大差别，并没有相关逻辑关系的存在，所以我们需要向具体信息所在语句的前面看，前面的内容为“They range from a few days for small lakes up to several hundred years for large ones; Lake Tahoe, in California, has a residence time of 700 years.”，they显然指的是本段首句中的residence times，所以这句话主要说的是residence times vary enormously.，而后面又列举the Great Lakes的residence times的差异性，主要就是为了对中心句“湖水的停留时间变化很大”进行举例说明，因此答案是A。
易错选项：(D)。
14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage.
This question is worth 2 points.
Water enters, remains, and eventually leaves a lake in a variety of ways.
●By measuring the...
●It is sometimes possible to decide
●The average period of time..
Answer Choices
○By measuring the water quantities at each of a lake's inputs and outputs, it can be determined whether water enters the lake mainly from surface or groundwater sources.
○Changes in lake level and volume are caused principally by the amount of evaporation of water into the atmosphere.
○It is sometimes possible to decide whether a lake is surface water dominated or seepage dominated by simple observation at different seasons.
○The average period of time that molecules of water spend in a lake—the residence time—varies from lake to lake and overtime within a particular lake.
○The residence times of surface-water-dominated lakes are usually longer than those of seepage-dominated lakes.
○The residence time of a lake frequently depends on the kinds of organisms to be found in the lake.
题型：文章小结题。答案是(A) (C) (D)
文章思路分析：
Topic：主要讲的是湖水的相关知识。
第1段：湖水的注入来源和流出途径。
第2段：计算湖水的注入和流出是一个很复杂的问题，需要考虑到几个方面。
第3段：两种湖：以地表水注入为主的湖(surface-water-dominated lake)，及以地下渗透为主要来源的湖(seepage-dominated lake)。
第4-6段：湖泊水的停留时间(a lake’s residence time)问题：
第4段：residence time的定义、测量方法、及决定因素;
第5段：湖泊与湖泊之间，residence time变化非常大，从小湖泊的几天到大湖泊的几百年;
第6段：一个给定湖泊的residence time也绝不是一个固定的值。它取决于水流进湖的速率，而水流进湖的速率取决于降雨量和蒸发速率。
答案分析：
A对应第三自然段前半部分的内容。
C对应第三部分后半部分的内容。
D是第五、六自然段意思的总结。
以上就是小编带来的托福阅读笔记之TPO24 Lake water,希望能够和备考的大家一起学习。更多托福考试资讯请关注前程百利。
您还可能关注：
