精品解析：甘肃省甘谷县第一中学2016-2017学年高一下学期期中考试英语试题

甘谷一中2016——2017学年第二学期高一期中考试 英语试卷 第一部分（一）阅读理解（每小题2分，共40分 ） A Children who spend more time outdoors may have a lower risk of becoming nearsighted，new research suggests. In the study，researchers looked at about 1，900 schoolchildren. The scientists found that the kids who had been instructed to spend more time outdoors for three years were 23 percent less likely to develop nearsightedness during this time than those who had not been instructed. The researchers selected six schools and required the children，whose average age was 7 at the start of the study，to attend one additional 60-minute class of outdoor activities during each school day for three years. The parents of these children were also encouraged to join their children for outdoor activities after school，especially during weekends and holidays. The other children，from another six schools，continued their usual activity patterns. After three years，30.4 percent of the kids in the intervention(干预) group became nearsighted，compared with 38.5 percent of the kids in the other group. It is not clear exactly why spending more time outside would benefit children’s eyesight，the researchers said. However，some research has suggested that the higher levels of light intensity found outdoors may increase the release of the chemical dopamine（多巴胺）of the eye. In turn，dopamine is known to restrain（抑制）the type of growth in the eye that is associated with nearsightedness. Based on the new results，the researchers recommend that children spend more time outdoors because of the potential benefits to their eyesight. However，it's important to protect kids' skin and eyes from UV light，which can be damaging. 1. What did the children in the intervention group do during each school day？ A. They attended an extra class of outdoor activities. B. They just continued to do their usual activities. C. They spent one hour in doing eye exercises. D. They participated in outdoor activities with parents. 2. What can be inferred about the chemical