Argument71 [越洋农场及同主题]pewcg8真实模考

pewcg8UID: 2143213

TOPIC: ARGUMENT71 - Copper occurs in nature mixed with other minerals and valuable metals in ore, and the proportion of copper in the ore can vary considerably. Until fairly recently, the only way to extract pure copper from ore was by using a process that requires large amounts of electric energy, especially if the proportion of copper in the ore is low. New copper-extracting technologies can use up to 40 percent less electricity than the older method to process the same amount of raw ore, especially when the proportion of copper in the ore is high. Therefore, we can expect the amount of electricity used by the copper-extraction industry to decline significantly.
WORDS: 432          TIME: 0:30:00          DATE: 2006-8-19
提纲：
1．        纯铜是否是现在在大量的生产？如果没有大量使用提纯的技术，根本谈不上大量的消耗电能．也许过去我们经常在这样提纯，但是作者说的新技术出现之前我们已经不再需要纯铜了，现在可能需要的正是这些化合物．
2．        即使确实我们在大规模的提纯铜，新的技术是否被大量的采用了呢？虽然省电，但是新技术的价格怎样？如果专利很贵的化，是不会有人使用新技术的．
3．        即使我们确实使用了新技术，也不能确保用电下降，可能由于新技术节约电，更多的矿被开采那么总体的电量会上升而不是下降．

With the use of new techniques in copper-extracting, the usage of electricity, the author claims,  will decrease significantly when compared to old methods. This ostensible sure conclusion lacks support as well as logic after careful consideration and needs to be examined in the following aspects.

It is true that extracting copper from ores that is low in this metal surely need more electric energy. But since the author has not provide any information on whether pure coppers are in great need, we do not know whether copper extracting are used often in mining. In other words, people might used to need pure copper a lot therefore old methods are used a lot. But when copper mixtures nowadays are in great need and pure coppers have not any markets in the world, then the extracting method might not be always needed. If this is true, the amount of electrical energy will be probably low and such a decline will not happen surely. The author fails to persuade us that copper-extracting cost a large amount of energy these days.

Even if they do use a lot of energy in extracting coppers, we are not persuaded that new methods will be used by those people. People who work in ores need to consider other factors about the new method. Is it easy to use? Do we need a large amount of money to buy such a technology? Is the patent fee high? Are other additives used by this new method high? These factors will need to be considered. When it cost much to use this new method, and much more than the consumption of energy, people would never use it.

In the end of the argument, the conclusion seems ungrounded too. Even if we concede that new methods are used in these ores, we can not safely reach the conclusion. It is completely possible that realizing the advantage of this new method, people are rushing to the mountains to excavate copper with the new method, although the amounts of energy used in a single ore decline a lot, with so many people doing this extracting, energy will be in great need. Consequently, the amount of electricity used by them will increase.

After scrutinizing the evidence and the reasoning of the author, we can not reach his or her conclusion and even draw an opposite one. To better persuade us, the author has to provide more information about the number of ores both before and after the usage of this new method as well as investigate into the whole cost and profit of the new way of copper-extracting.

pewcg8UID: 2143213

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