There are two main causes of cancer: heredity and environment. We can do nothing to change our heredity, that is, the basic physical characteristics that were passed on to us by our parents. However, we can do a GREat deal to control our environment, which may account for 80-90 %of all cancers.
Environmental pollution can be divided into two kinds: personal and impersonal. Personal pollution may be defined roughly as unhealthy habits such as smoking, drinking, and eating the wrong foods. Clearly, with enough will power we can control this personal environment.
Impersonal pollution, on the other hand, refers to those things which are beyond our individual control. One example would be industrial pollution, which is very hard to control because of the expense involved. It would be expensive in terms of profits and perhaps jobs. The American automobile industry, for example, resisted the law requiring smog-control devices because it feared the added expense would reduce profits. Nevertheless, some laws protecting the environment have been quite successful in reducing pollution.
雅思写作素材:Agree or disagree模板
雅思写作字数问题的疑惑解答
雅思写作高分模板:信息描述或数据比较
雅思写作高分模板:利弊分析型作文
雅思写作高分不可忽视的三个要点
雅思写作:图表作文的注意事项(英)
雅思写作培训类题目分析
雅思写作高分模板:开放观点式作文
浅谈雅思写作提高的三个必经阶段
雅思写作科技话题必备短语及表达
雅思写作高分模板:原因问题及解决
雅思写作高分模板:对立观点式作文
雅思写作素材:点睛词组及例句
雅思写作高分模板:命题形式报告文
雅思写作素材:媒体词汇及句型
雅思写作:写作段落辅导(英)
G类雅思投诉信的写作思路指导
雅思写作素材:如何提出建议
雅思写作模板:网络带来的利弊
雅思写作模板:个人不能改善环境?
雅思写作:经典转折句型备考素材
雅思写作素材:图表作文的时间表达
雅思写作经典加分句型
雅思小作文攻略+范文:曲线图
雅思写作高分模板:现象分析型作文
雅思写作高分模板:单一观点式作文
烤鸭教你如何准备雅思写作8分素材
实用雅思写作词汇:图表作文程度副词
雅思写作高分模板:利弊关系型作文
雅思写作把握选词的准确性
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |