从含铜废料（如：覆铜板、印刷线路板及铅冰铜等）中提取铜，既可提高资源的利用率又可减少重金属污染．

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1). 每处错误及其修改均仅限一词；

2). 只允许修改10处，多者（从第11处起）不计分。

    People often come up across the word ＂SOHO＂ in the newspaper or magazine. But not everyone knows how it means. As the matter of fact, ＂SOHO＂ means ＂Small Office/ Home Office＂. Now many people use computer, so it is possible for you to work at their homes. They needn't go to offices. They can usually work fast and better at home. By work at home, they save a lot of time and energy. They needn't spend time on the road but they won't feel tired or angry because the bad traffic. Maybe in the future, more and more people would be＂SOHO＂ workers.

塞曼的经历对我们有什么启示？

点拨：许多人并不是没有理想，并不是没有潜力，但最终都碌碌无为，一事无成。其主要原因是不愿意吃苦，不能克制自己，不愿为了自己的长远利益而牺牲眼下的享乐。塞曼认识到了自己的弱点，并想办法克服它、战胜它，所以他就能自强，就能成功。