■ Direction You have 20 minutes to plan and write your response. Your response will be judged on the basis of The quality of writing and on how well your response presents the points in the lecture and the relationship to the reading passage. Typically, an effective response will be 150 to 225 words. ■ Question Summarize the points made in the lecture you just heard, explaining how they cast doubt on the points made in the reading
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▶지문 : WRT 통합형 연습 1 리딩지문
The Salton Sea in California is actually a salty inland lake. The level of salt in the lake's water—what scientists call its salinity—has been increasing steadily for years because the lake's water is evaporating faster than it is being replaced by rainfall or rivers. If the trend continues, the lake's water will soon become so salty that the lake will be unable to support fish and bird populations. The lake would then become essentially a dead zone. Fortunately, there are several ways to reverse the trend that is threatening the lake's health.
One option is direct removal of salt from the lake's water in special desalination facilities. Water from the lake would be pumped into the facilities and heated. This would cause the water to evaporate into steam, while salt and other materials dissolved in the water would be left behind. The steam would then be cooled down and returned to the lake as salt-free water. Gradually, the high salt levels would be reduced and the lake’s overall health would be restored.
Another possible solution is to dilute the salt level in the lake with water from the ocean. Since water in the Pacific Ocean is 20 percent less salty than water in the lake, bringing ocean water into the lake would decrease the lake’s salinity. The ocean water could be delivered through pipelines or canals.
Yet another solution would be to control the lake's salinity by constructing walls to divide the lake into several sections. In the smaller sections, salinity would be allowed to increase. However, in the main and largest section, salinity would be reduced and controlled by, among other things, directing all the freshwater from small rivers in the area to flow into that main section of the lake.
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The reading passage contends that the lake's water will soon become so salty essentially a dead zone. Scientists are several ways to reverse the trend that is threatening the lake's health. On the other hand, the lecturer brings up several points that contradict this argument.
First of all, the lecturer points that the lake's water in special desalination facilities directly make the salt from the lake's water. It is true that water from the lake would be pumped into the facilities and heated. This would cause the water to evaporate into steam, while salt and other materials dissolved in the water would be left behind. But some of the chemical has toxic called cellaniam. Eventually, there would be very dangerous to people's health. This refutes the author's point that the lake's water in special desalination facilities directly remove the salt from the lake's water.
Moreover, in the lecture, the point is made that the lake with water from the ocean not to dilute the salt level. If the ocean water could be delivered through pipelines or canals, it brings ocean water into the lake would decrease the lake’s salinity. But pipelines or canals are very expensive, and the local government may not have money for that. And It can not build long distances. This casts doubt on the idea in the reading passage that the lake with water from the ocean to dilute the salt level.
The final point made by the lecturer is that construct walls to divide the lake into several sections would not be to control the lake's salinity. It is obvious that salinity would be allowed to increase In the smaller sections and salinity would be reduced and controlled by the main and largest section. But there has a geological problem such as earthquakes. And the walls are collapse and mix. This is different from the passage's view that construct walls to divide the lake into several sections would be to control the lake's salinity.