tpo24阅读分析.docx

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Tpo24阅读分析
Tpo24

Reading 01 Lake Water
(1)
paragraph2: The questions become more complicated w the matter of a lake’s residence time. The residence time is the average length of time that any particular molecule of water remains in the lake, and it is calculated by dividing the volume


would depend on the route it took: it might flow through as part of the fastest, most direct current, or it might circle in a backwater for an indefinitely long time.
7. It can be inferred from paragraph 4 that the length of time a given molecule of water remains in a lake
○depends entirely upon the average speed of a lake" s currents
○can be measured by the volume of the lake alone
○can be greater or lesser than the residence time

4
○is similar to the length of time all other molecules remain in that lake

以a given molecule of water做关键词定位至最终一句，说Residence time是平均值，一个分子在lake里的时间取决于它的route，有可能很快也有可能很慢，所以正确答案是C，或者多或者少。A和B原文没说；D说反，原文都说了一个具体的分子和residence time不一样，错

(3)
plete the summary by selecting the THREE answer choices that express the most important ideas in the passage.
Water enters, remains, and eventually leaves a lake in a variety of ways.
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. (对应第三段前半部分，正确)
○Changes in lake level and volume are caused principally by the amount of evaporation of water into the atmosphere. (原文没说，不选)
6
○It is sometimes possible to decide whether a lake is surface water dominated or seepage dominated by simple observation at different seasons. (对应第三段后半部分，正确)
○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. (对应第五段首句，而且第六段也在说变化，正确)

○The residence times of surface-water-dominated lakes