我国人民在科技创新的同时不忘记资源回收与再生利用这种环保理念，下列哪一个人的创新 发布时间：2017-05-05 15:13 │ 来源：www.tikuol.com 题型： 问题： 我国人民在科技创新的同时不忘记资源回收与再生利用这种环保理念，下列哪一个人的创新过程体现出了这一点A．蔡伦改进造纸术 B．毕升发明活字印刷C．侯德榜发明侯氏制碱法D．袁隆平发明杂交水稻
题型： 阅读下列短文，然后在每小题的A、B、C、D四个选项中选出最佳选项。 Hong Kong Bans (禁止) Smoking Do you plan to go to Hong Kong Disneyland with your family? If your dad smokes, you must ask him to be careful. From January 1, 2007, Hong Kong bans smoking in most public places. The places include restaurants, workplaces, schools and karaoke rooms. Even smoking in some outdoor places like beaches, sports grounds, museums and parks is against the law. Hong Kong hopes the ban can prevent passive smoking. It does great harm to people's health. And it'll be better if more people in Hong Kong give up smoking because of the ban. Hong Kong has 7 million people. Among them, about 840,000 people aged 15 or above are smokers. Amy Choi, 27, a student, agrees to the smoking ban."I don't like people smoking next to me. It's so smokyand smelly," she said. If someone breaks the ban, he will have to pay up to HK$5,000.The ban does not include nightclubs, bars or bathhouses yet. But these places will have to ban smoking by July, 2009. Hong Kong is not the first Asian city to have a smoking ban. On January 1, 2006, Singapore banned smoking in most public places. 1. Now people can smoke __________ in Hong Kong.[ ]A. in restaurantsB. in schools C. in karaoke rooms D. none of the above 2. What is the main idea of the third paragraph? [ ]A. Where can't people smoke? B. What is passive smoking? C. Where can people smoke? D. Give up smoking. 3. How many people under 15 in Hong Kong smoke? [ ]A. 0.84 million people. B. 6.16 million people. C. 7 million people. D. The text does not tell us.4. When you stay with a smoking person, you will feel_________. [ ]A. smokyB. smellyC. light-hearted D. A and B 5. Which of the following is not true?[ ]A. If you break the ban, you will have to pay as much as HK$5,000. B. You can still smoke in nightclubs, bars or bathhouses at present. C. You can never smoke anywhere in Hong Kong in 2009. D. So far more than one city have banned smoking in the world. 查看答案
题型： 氨合成时，增加空速可使气体与催化剂的（）。A、接触时间增强，出塔气中氨含量增大B、接触时间缩短，出塔气中氨含量降低C、接触时间增强，出塔气中氨含量下降D、接触时间缩短，出塔气中氨含量增大 查看答案