英语 四级范文.doc

Food Contamination(食品污染)From time immemorial, food contamination has become a common phenomenon in China, ranging from poisonous milk power to the plasticizers in huge quantities of beverages and food exported to the mainland. The public has experienced so many crises of food contamination that only the most deadly cases would create some sensations, which soon pass into oblivion with the quick occurrence of new ones. contaminationis indisputably detrimental. The poisonous milk power has bereaved many young couples of their innocent and lovely new babes. Some contaminated foods lead to irreversible and chronic diseases. Some affected individuals, though without visible aftermaths, may suffer from lingering psychological trauma. However, the hazards produced by food contamination are more moral than physiologicalwith contamination cases cropping up here and there, the credibility of the entire society has been ruined and people find nothing and nobody to be trustworthy. Technically,food contamination is caused by the introduction of illegal additives and non-edible chemical substances into the manufactured food. Morally, it results from the sheer drive for profitability by gluttonous merchants who use cheaper, and often harmful, substitutes, all at the expense of the physical welfare of the public. To address the problem, some appeal to the moral conscience of the businessmen. But the high frequency at which contamination cases have happened makes this moral appeal feeble and futile. The ultimate solution lies in lawthe profit-minded businessmen would not have a penitent heart unless they are driven to bankruptcy and taken into jail!从远古时代开始,食品污染在中国已经成为一种普遍现象,从有毒牛奶权力大量的增塑剂饮料和食品出口到中国大陆。食品污染的公共经历了太多的危机,只有最致命的情况下将创建一些感觉,它很快就通过与快速发生新的被遗忘。 污染无疑是有害的。有毒的牛奶权力夺去许多年轻夫妇他们的天真和可爱的宝贝。一些被污染的食物导致不可逆的和慢性疾病。一些受影响的个人,虽然没有可见的余波,可能遭受挥之不去的心理创伤。然而,食品污染产生的危害比physiological-with道德污染情况下出现,整个社会的信誉被毁了,人们发现任何人、任何事都是值得信赖的。 从技术上讲,食品污染是由于非法添加剂的引入和非食用化学物质制造食物。道德,结果从纯粹的追求盈利贪吃的商人使用更便宜,而且经常有害,替代品,所有的物理福利为代价的。为了解决这一问题,一些吸引商人的道德良知。但污染的高频情况下发生这种道德吸引力的和徒劳的。最终的解决方案在于法律的唯利是图的商人不会忏悔的心,除非他们被迫破产和带进监狱!Students Rating of Their Teachers（学生评价老师）Nowadays, it has become as common in colleges and universities for students to grade teachers as for teachers to grade students. In some universities students rating has even become the only source of information on teaching effectiveness This, however, has caused great controversy. Some are in favor of the rating system, They hold that since students attend the teachers classes every day, they should have their opinion about their teachers effectiveness. Others, on the contrary, are strongly against it. They believe that there is much more to teaching than what is shown on students rating forms. Students should not be expected to judge whether the materials they use are up to date or how well the teacher knows about the subject. These judgments require professional knowledge, which is best left for the teachers colleagues. I think students rating of their teachers is necessary, but it should be conducted in a way that can really shed meaningful light on teachers performance. Instead of rating the teachers knowledge on the subject, students should be asked to estimate what they have learned in a course, and to report on such things as a teachers ability to communicate with students, his or her relationship with students, and his or her ability to arouse students interest in the subject. 如今,它已成为普通高校学生年级教师对于教师年级的学生。在一些大学学生的评级甚至成为唯一的信息来源对教学效果然而,这已经引起了很大的争议。有些人赞成评级系统,他们认为,由于学生参加教师的课每一天,他们应该有他们的意见关于他们教师的有效性。其他人,相反,强烈反对它。他们