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thanhton159357
2 năm trước
Cho hình thang ABCD (AB <CD , AB // CD ) . Trên cạnh AB lấy điểm I trên cạnh BC lấy điểm K sao cho IK //CD . IK cắt đường chéo AC tại E chứng minh rằng a) AI/AD = AE/AC b) AI/AD = BK/BC
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Smoking causes lung cancer, which is the number one cancer among men. Ninety percent of the people who get lung cancer die. Smoking is also the leading cause of mouth cancer, tongue cancer and throat cancer. Many smokers have heart disease and pneumonia. Smoking causes one million early deaths in the world every year. Smokers do not only do harm themselves but also harm others. Smokers breathe smoke out into the air. They breathe it out on their children and their wives or husbands. Children whose parents smoke have more breathing and lung problems than other children. Women who are married to smokers are more likely to have lung cancer than those married to non-smokers. We all aware that smoking is bad. So why do people smoke? 1. The number one cancer among men is lung cancer. 2. The main cause of mouth cancer, tongue cancer, throat cancer is drinking. 3. Smokers only do harm to others not themselves. 4. Every year, smoking causes about one million early deaths. B. Choose the best answer: 5. What is the main idea of this passage? A. The reason why people smoke. B. How to give up smoking. C. The bad effect of smoking. D. Parents shouldn’t smoke. 6. The word “it” in line 6 in the passage refers to ………………. A. cancer. B. smoke. C. air D. breath

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