河北省定州中学2016-2017学年高一下学期周练（1）英语试题

河北定州中学2016-2017学年第二学期高一英语周练试题(1) 一、阅读理解 What happens inside the head of a soccer player who repeatedly heads a soccer ball? That question motivated a study of the brains of experienced players. Researchers at the Albert Einstein College of Medicine in New York selected 34 adults, men and women. All of the volunteers had played soccer since childhood and now competed year-round in adult soccer leagues. Each filled out a detailed questionnaire developed especially for this study to determine how many times they had headed a soccer ball in the previous year, as well as whether they had experienced any known concussions (脑震荡) in the past. Then the players completed computerized tests of their memory and other learning skills and had their brains scanned, using a complex new M.R.I. technique which can find structural changes in the brain that can’t be seen during most scans. According to the data they presented, the researchers found that the players who had headed the ball more than about