大学英语四级考试作文--说明文

大学英语四级考试作文（6）--说明文2009-10-14 20:26(一)说明文(1)　　说明文一般用于解释和分析社会现象或社会问题。要求考生对某种社会现象产生的原因及其可能造成的种种影响或应采取的措施进行分析和说明。此类文章的基本结构如下：　　Paragraph 1 phenomenon (现象)　　Paragraph 2reasons (effects)(原因或危害)　　Paragraph 3suggestions or solutions (措施)　　Drug abuse among young people has become more and more prevalent over recent years. (主题句)Statistics show that the number of youth drug users almost doubles in the past three years.(数据支撑) It is vital to analyze why drugs are so attractive to young people and what can be done to combat it.(结论)　　Firstly, teenagers are under increasing pressure - this may be peer pressure or pressure to succeed for example. Drug use may help them escape reality, forget their problems, or simply feel more accepted by their friends.(原因1) In addition, through the media we are exposed to information that glamorizes drug use and makes it look attractive, particularly to young people.(原因2) Furthermore, teenagers are usually naturally curious about drugs, and drug dealers can take advantage of this curiosity for their own profit.(原因3)　　High fines and prison sentences should also be imposed on drug dealers and users. (措施1) However, it is my own personal view that prevention is better than cure and so a good education programmed about the dangers of drug abuse is one of the most important steps any government should take. (措施2)　　(二)说明文(2)　　比较性说明文用于比较两种或几种类似的事物，要求考生通过比较它们各自的优点或缺点，说明自己的看法，并加以论证。这种文章的基本结构如下：　　Paragraph 1 phenomenon(现象)　　Paragraph 2advantages (优点)　　Paragraph 3disadvantages (缺点)　　Paragraph 4comments(结论)　　A mobile phone is getting increasingly popular.(主题句) Statistics show that eight out of ten college students have got one.(数据支撑) However, as is the case with many issues, a mobile phone has both positive and negative aspects. (承上启下)　　On the positive side, a mobile phone allows calls to be made instantly from almost any location. This can be vital where emergency services need to be called to the scene of a crime, accident or fire, where no public telephone is nearby. (优点1) Meanwhile, a mobile phone can serve as a connection to the Internet, which can be extremely convenient for obtaining information wherever you may be. (优点2) 　　The fact that a mobile phone allows a person to be contacted at any time can in itself be a disadvantage. For instance, an employee may, via the mobile phone, be constantly available to his employer and feels that he never leaves work. This may cause distress. (缺点1) Another disadvantage is theperceived health risks associated with its use. Some people believe that using mobile phones for long periods can damage the brain. (缺点2)　　There is no denying that a mobile phone has both benefits and drawbacks but on balance perhaps the advantages of a mobile phone outweigh its disadvantages since a mobile has become an integral part of modern life. (结论)　　(三)说明文(3)　　图表写作也属于说明文的类型，这种文章通常结构是：　　Paragraph 1change(变化)　　Paragraph 2reasons or implication(原因或意义)　　Paragraph 3conclusion (effects; implication)(结论)　　The period 1995~2005 witnessed a rapid increase in the number of people in City X traveling abroad. As can be seen, in 1995, only about 10,000 people in this city went overseas while in 1995 this number quickly rose to 40,000. In 2005, however the number of overseas traveler surged to over 120,000, which is more than 10 times as many as that of 1995. (变化)　　This change can be accounted for by a couple of factors. First, along with social and economy progress, the living standard of the Chinese people has been greatly enhanced, so they have enough money and time to travel abroad. Meanwhile, more and more people want to enjoy themselves and broaden their vision by visiting overseas historical places and experiencing exotic cultures. (原因)　　Overseas travel has a profound effect on both individuals and the society. It can widen our people’s horizons, promote friendship and enhance cultural interaction. In the meantime, it can also boost our social economy and make our society more prosperous and dynamic. It’s good for our nation’s progress. (结论)