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您现在的位置:首页> 大学英语> 英语四级> 真题> 2014年6月英语四级作文真题附范文(第2套):A Beautiful City in China

2014年6月英语四级作文真题附范文(第2套):A Beautiful City in China

发布时间:2014-07-03 14:38浏览次数:71628
要求:
Suppose a foreign friend of yours is going to visit your hometown,what is the most interestingplace you would like to take him/her to see and why?
用户的作文(系统评分85.0分
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文章用词灵活多样,学术词汇使用也比较准确;句式多变,多多练习从句的使用;语言不流畅;连词使用偏少;请注意分段;可以适当增加副词的使用。

用户练习作文:

Because more than 80% of marine debris is plastic, which is the formation of some other practices, such as the processing of marine waste plastic, this resource is transformed into another resource. Existing research shows that, through a variety of technical means to plastic into human can use a variety of resources and consumption. For example, can use the waste plastics manufacturing fuel, the production of waterproof glue, antifreeze preparation of aromatic compounds and preparation of multifunctional resin etc.. Now, the fuel has been a breakthrough in some countries made of waste plastics, such as China and Thailand. In 2003, an identification technology of China Chengdu - waste plastic recycling fuel technology and process equipment in Sichuan Province Environmental Protection Bureau and the relevant experts. The application of the technology of recycled plastic, not only can produce high purity of 90 to 93, but also the production of gasoline, diesel. Because of its low production cost, the price than similar products on the market around 300 yuan per ton cheaper. Any plastic waste, such as bags, plastic bags, water bottles, foam lunch boxes, without any classification and cleaning treatment, after chemical cleavage, can make them into the oil gas, and cooled after fractionation, the reduction of liquid mixed oil. Of course, whether this technology can put into production, also need many conditions, such as capital, land, personnel, and the technology of practical and promotion etc.. In 2010, Thailand announced, Thailand and Southeast Asia's first waste plastic reproduction fuel project in Thailand Hua Hin city start, consumption of 6 tons of plastic waste every day, produce 4500 liters of fuel, the annual output of 1350000 liters. If this technology can be popularized and the mode of production, do not worry about marine garbage can't find a place to digest. On the other hand, study on Preparation of aromatic compounds are Japan and other countries. The polyethylene, polypropylene and other waste plastic is heated to 300 DEG C, so that decomposition of carbohydrates, then add the catalyst to synthesis of benzene, toluene and xylene and other aromatic compounds. The reaction at a temperature of 525 DEG C, 70% waste plastics can be converted into useful aromatic substances, they do chemicals and pharmaceutical raw materials and fuel improver, the remaining ingredients can be converted into hydrogen and propane. Therefore, if the technology is mature and put into operation, will be able to digest a lot of marine litter, and may make some countries for the sea without the waste of resources.

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