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When people handle food properly, the risk of food poisoning is very small. Microorganisms multiply rapidly in dirty places and in warm temperatures. This means that people should never touch food with dirty hands or put food on unwashed surfaces. Food should be kept in a refrigerator to stop microorganisms from growing. Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered with chemicals before eating it. Finally, people should not eat wild mushrooms or other foods that grow in the wild. Some of these foods may contain natural materials that are poisonous to humans. In addition, some types of fish can be poisonous. Most people recover from food poisoning after a few days of resting and drinking extra water. If people eat natural poisons, they must go to the hospital right away to have their stomach s emptied. 40. Which of the following statements is NOT true? A. Food wh en poisoned can make people sick. B. Food poisoning means death. C. Food poisoning comes in varieties. D. Food poisoning can be serious. 41. We know from the passage that the symptoms of food poisoning_____. A. are always accompanied by a fever B. are too common to be noted C. can be noticed within hours D. can be ignored 42. Food poisoning can be caused by all the following EXCEPT_____. A. some chemicals B. low temperatures C. some tiny living things D. certain natural materials 43. From Paragraph 5, we can learn that_____. A. mushrooms should not be eaten B. vegetables are safer than meat and seafood C. natural poisons are more dangerous than chemicals D. different types of food should be handled differently C Getting a new PC is one thing. Keeping it running smoothly is quite another. While a personal computer should continue to perform well for years, users know that system unsteadiness does exist. Yet you can reduce it to the smallest amount by following the tips below. First, put in as little software as possible. You have fewer software-related problems and a system that is easier to manage. Second, you should ensure that you have as much as memory (RAM) in your PC as you need. If you run Windows 98, your computer should have at least 128 megabytes (MB) of RAM and more. You can also get by with 128 MB of RAM if you use Windows NT or Windows 2000, but these operating systems will run much more smoothly if you have 256 of RAM or more. Third, make sure you buy good hardware. No-name products may be cheaper and sometimes just as good as name-brand products, but name-brand products usually become well-known because of their steadiness. It's wise to buy products from famous companies because Windows will more often support the hardware that you buy. If you are starting out with computers, it’s also a good idea to buy ready-made systems from major manufacturers. They are likely to have been tested thoroughly with your operating system, and you will generally experience fewer problems. Fourth, do prepare for disaster. No matter how well your system runs when you get it, the day will come when it will need to be replaced. Hopefully, you will replace it because technology has become out-dated, but you may need to replace it also because the hard drive crashes or you begin experiencing problems that no one can figure out. That's why it's important to copy your important information regularly. Whether you use a tape backup device or a CD-RW drive, it's important to make a regular backup plan and stick to it. 44. If you want to use Windows 2000, but your computer only has 64 MB. What will you have to do ? A. Enlarge its RAM to at least 256 MB.B. Put in good software in your computer. C. Enlarge its RAM to at least 128MBD. Have Windows NT to made it. 45. How many pieces of advice o n buying good hardware does the writer give us? A. Three B. Two C. One D. Four 46. It cab be inferred from the last paragraph that__________. A. your computer will copy the important information when the system fails. B. your computer might lose all the information when its hard drive crashes. C. you have to replace your computer one day. D. you must change your system regularly. 47. The best title of this passage can be_____________. A. The Tips You Must FollowB. How to Start out with a Computer C. How to Use Your PC BetterD. How to Keep Your PC Stable(稳定). D Can you swim? Do you like swimming? Yes? Well, how can you learn to swim? I think the best way is to go into the water and learn. I’m afraid you’ll never learn to swim just by reading books about swimming or looking at others swimming. It’s the same with English study. We must practise, practise and practise. Listening and speaking are very important for beginners. The children in English-speaking countries first listen to others. Then they try to imitate and speak. We can listen to English programs on the radio. Maybe at first you can understand only a few words. It doesn’t matter. Just be relaxed. Keep listening and try to catch every word. Somebody may be a good listener. But he is too shy to speak. He’s afraid of making mistakes. You know we sometimes make mistakes when we speak Chinese. Don’t be afraid. We must be brave. If you really want to learn English well, you must try to speak with anyone who knows English. Whether you know him or not is not important. When there’s nobody to talk with, you can talk to yourself in English. It’s interesting and also a good way to practice your spoken English. Remember, the more you speak, the fewer mistakes you’ll make. Reading and writing are more important for senior school students. First you must choose the books you’re interested in. A lot of reading will improve your language sense. This is the important thing. Keep writing English diaries. We can also write English articles. You may even post them to English magazines. Don’t be afraid of failure. Failure is the mother of success. (责任编辑：admin) |