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1、2021大学英语四级语法精讲精练大学英语四级语法精讲精练四六级考试网权威发布2016年12月大学英语四级写作之议论文精讲(3)，更多2016年12月大学英语四级写作之议论文精讲(3)相关信息请访问大学英语四六级考试网。四六级秋季定制班！权师助你高分过关点击免费试听！Smoking is a bad habit that does a lot of harm to human health. Cigarette smoking does great harm to human health. In many cases, cigarette has proved to be the direct
2、 cause of such a fatal disease as cancer-hence its nickname, Cancer Stick. Experts say that smoking one cigarette can reduce ones life by about 15 minutes and that chain smoking is far more hazardous. Recent findings of medical research show that even a tiny drop of nicotine (about 3 grams in weight
3、) can kill a large animal like a horse. Some medical reports have also proved that heavy smoking would seriously affect an adults sexuality, and smoking after a meal also disturbs ones digestive system. Cigarette smoking not only jeopardizes the physical health of a smoker, it also affects the healt
4、h of a nonsmoker who passively inhales the polluted air into his or her lungs when he or she is exposed to a winding shroud of cigarette smoke. The impact on such passive smokers (also called second-hand smokers), according to the experts in the medical field, can be even more damaging, and that is
5、why smoking is usually prohibited in most public places. (196 words)(2)议论文中常用的词句与短语一.数据对比用语：1. are similar in their range of indicators2. cause / lead to a rapid / slow increase / decrease in the number / amount of3. cause to drop4. climb dramatically fromto5. constitutes aboutpercent 6. continue to
6、 rise / fall7. continue to widen / shorten8. declines to less than percent.9. drop / fall to as many / much / little as10. fall / rise / increase / decrease dramatically11. fluctuates between12. grow only marginally fromto13. increase / decrease slowly14. increase/ decrease lightly15. is doubled16. is inversely proportional to17. is significantly lower / higher than18. lead to an increased number / amount of19. level off / remain constant at20. lower the percentage of 21. maintain approximately the same number of22. narrow down to第 3 页 共 3 页