四川省雅安市20xx届高三下学期第三次诊断考试英语试题

四川省雅安市20xx届高三下学期第三次诊断考试英语试题内容摘要：

kids who have low screen times also have low levels of physical activity, he points out. As well, screen time is not necessarily bad, Janssen said. “The tricky part is that children today need to be using puters,” he said. Computers are required for schoolwork, and technological skills are important for future job prospects. The quality of screen time matters too, along with the quantityconsider the negative health messages found in food advertising during children‟s shows, he said. Ideally, children should aim for no more than two hours of recreational screen time a day. Janssen‟s real worry about the rise in childhood obesity rates is not that there are now rare cases of type 2 diabetes in kids, where once there were none, hut the health problems these children are likely to face in the future as adults, including high blood pressure, high cholesterol and cardiovascular disease. 28. Which one doesn‟t belong to “screen time” according to the passage? A. Watching TV. B. Surfing the Inter. C. Seeing a film on an MP4. D. Making a telephone call. 29. In Janssen‟s opinion, kids had better to keep healthy. A. lose weight. B. decrease screen time C. take physical activities D. go on a diet 30. What‟s the researcher‟s attitude towards “screen time of adolescents ? A. Concerned. B. Passive. C. Positive. D. Frightened, 31. We can learn from the passage that . A. many of the people having fulltime jobs suffer from obesity and diabetes. B. decreasing screen time can‟t really solve the problem C. children today most use puters to finish their school work D. a new type of obesity in kids bees Janssen‟s real worry D A 2 billion year old Martian (火星的） rock appeals to have at our time been full of water from the surface of the Red Pla. “Here we have a piece of Mars that I can hold in my hands. That‟s really exciting,” Carl Agee, director of the Institute of Meteoritics at the University of New Mexico, told the Associated Press. Agee led a team of scientists who published their report on the newly discovered meteorite （陨石）， nicknamed Black Beauly, The rock is estimated to have contained 6,000 parts per million water? and scientists believe it likely interacted with water at a time when most of the pla‟s surface was believed to have been arid. The baseballsize rock was discovered in the Sahara, and scientists say it contains more evidence of water than any of the other known Martian rock samples. “It‟s fairly fresh. It hasn‟t been subjected to a whole lot of weathering (风 化作用）， ” University of Alberta meteorite expert Chris Herd told the AP. Billions of years ago an eruption on the surface of Mars, likely caused by a volcano or pla collision, sent the rock into space, where it eventually made the journey to Earth, Agee and his team said the sample is “strikingly similar to the volcanic rocks examined by the NASA rovers Spirit and Opportunity on the Martian surface.” Over the years, scientists have collected more than 60 Martian rock samples, with most being discovered in the Sahara and Antarctica. The new sample is much older than most of the other specimens, which are about 600 million years old or younger. The oldest known sample is an estimated billion years old. 32. The underlined word “it”in Paragraph 3 refers to “ ”. A. Mara B. the Red Pla C. Black Beauty D. the report 33. Where was the meteorite found? A. In I he Sahara. B. In Antarctica. C. In Mars. D. In America. 34. Which of the following is NOT true according to the passage? A. Black Beauty has the size of a baseball. B. Blank Beauty contains the most evidence of water among the known Martian rock samples. C. An eruption on the surface of Mars sent the rock into Earth directly. D. Black Beauty is not the oldest known sample. 35. Where can we most probably read this text? A. In a personal diary. B. In a science report. C. In a travel magazine. D. In a geography textbook. 第二节（共 5 小题；每小题 2 分，满分 10 分） 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。 选项中有两项为多余选项。 Use phones respectfully You probably spend more time with your smart phone than any other possession. You lake it everywhereto school, to meals, and even to the bathroom. 36 But we have to learn to use our phones respectfully or at least without offending others around us. Here are some tips for smart phone usage. Take a look. Use “do not disturb” instead of “vibrate。