托福阅读长难句PPT学习教案.pptx

会计学
1
托福阅读长难句
本节课授课目标





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句子的主干
句子的主干指的是句子的核心信息。包括句子的主要成分和主要的逻辑关系。
长难句各个成分的识别：
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定语从句
Over long periods of time, substances whose physical and chemical properties change with the ambient climate at the time can be deposited in a systematic way to provide a continuous record of changes in those properties overtime, sometimes for hundreds or thousands of years.
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定语从句
The sheer scale of the investment it took to begin commercial expansion at sea reflects the immensity of the profits that such East-West trade could create.
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名词性从句
In lowland country almost any spot on the ground may overlie what was once the bed of a river that has since become buried by soil; if they are now below the water’s upper surface (the water table), the gravels and sands of the former riverbed, and its sandbars, will be saturated with groundwater.
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名词性从句
One of the most difficult aspects of deciding whether current climatic events reveal evidence of the impact of human activities is that it is hard to get a measure of what constitutes the natural variability of the climate.
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名词性从句
Western Farmers borrowed with the
confident expectation that the expanding
economy would keep farm prices high, thus making it easy to repay loans when
they fell due.
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状语从句
In order for the structure to achieve the size and strength necessary to meet its purpose, architecture employs methods of support that, because they are based on physical laws, have changed little since people first discovered them—even while building materials have changed dramatically.
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状语从句
Immediately adjacent to the timberline, the tundra consists of a fairly complete cover of low-lying shrubs, herbs, and grasses, while higher up the number and diversity of species decrease until there is much bare ground with occasional mosses and lichens and some prostrate cushion plants.
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