广东省广州市珠江中学20xx届九年级上学期期中考试英语试卷

广东省广州市珠江中学20xx届九年级上学期期中考试英语试卷内容摘要：

mmal(哺乳动物 ) in the world. In 2020， Gurdon’s work was developed by Yamanaka to show that a sample of a person’s skin can be used to create stem cells. Using this technique, doctors can repair a patient’s heart after a heart attack. “Luck favors the prepared mind,” Gurdon told the Nobel Prize Organization. “Niy percent of the time things don’t work, but when they do, you have to seize the chance.” 31. Who won the 2020 Nobel Prize in Medicine? A. Sir John Gurdon B. Shinya Yamanaka C. Sir John Gurdon and Shinya Yamanaka D. Gurdon’s science teacher 32. What does the underlined word “ridiculous” mean? A．荒谬的 B．无畏的 C．荒废的 D． 无知的 33. In what order are the following events mentioned in the passage. a. create the sheep Dolly b. take a cell from an adult frog c. use a person’s skin to create stem cells d. move a frog’s geic information into an egg cell e. grow into a clone of the adult frog A. bacde B. bdeac C. bdaec D. bcdae 34. According to the passage, which statement is TRUE? A. Sheep Dolly was the first cloned animal in the world. B. Gurdon ranked first at his high school in biology. C. It’s impossible for the doctors to repair a patient’s heart after a heart attack. D. According to the science teacher, Gurdon was not a gifted student. 35. What’s the main idea of the passage? A. Niy percent of the time things don’t work. B. Luck favors the prepared mind. C. Life is full of pleasure. D. How to know cells actually work. C If you bought some candy months ago but never ate it, how can you tell whether it’s still eatable? The easiest way is to check the “expiration date (EXP)” printed on the cover. If that date has already passed, you’re likely to throw the candy away. But is that really necessary? According to a new report from the NRDC, tons of food is wasted each year, largely because people don’t fully understand what expiration dates, or “useby dates”, actually mean, so they think the food is not safe to eat. Food dating was introduced in 1975 because customers wanted more information about the things that they were eating. When they first showed up, useby dates only showed freshness because producers wanted their products to be tasted in their best conditions. However, most customers mistakenly believed that useby dates showed how safe the food was. But the truth is that these dates aren’t related to the danger of food poisoning. Eggs, for example, can still be eaten three to five weeks after being bought, even though the useby date is much earlier. When their useby dates pass, cookies may lose their crunch (松脆 的口感 ), but they are not harmful. “It’s an unclear subject, the difference between food quality and food safety,” said Jena Roberts from a US food testing pany. “Even the workmates in the food factory are not sure about it. This is why the useby dates must be printed on the covers of products. “We hope it can help customers understand the information so that they won’t waste a lot of food.” But this won’t be a mistake that is easy to correct, because people have believed it for so long. Another problem is that the quality levels of different foods change differently. Some are still eatable long after their useby date while others are not. As a result, food factory officials are now thinking of changing the useby date to a date which can show when food is most likely to be thrown away. 36. Every year, why is tons of food thrown away? A. Because it is no longer delicious. B. Because it is no longer fresh. C. Because the useby dates are wrongly printed. D. Because people think it’s not safe to eat. 37. Which of the following pictures can show the meaning of “expiration date (EXP)”? 38. What did the useby dates show at first according to the passage? A. Food freshness. B. Food quality. C. Food safety. D. Food producer. 39. What can we learn from Paragraph 4? A. Most customers care more about freshness than food safety. B. Most customers fully understand what exp。