大学英语视听说教程第二单元.ppt

Audio Task 2 Checking the Facts 1. Most middle-aged adults have little Internet experience. 2. Twenty-four volunteers with Internet experience formed the two groups. 3. The 24 volunteers were between 55 and 76 years old. Listen to the audio clip again and decide whether the following statements are True (T) or False (F). Script F T F Searching the Internet may help middle-aged and older adults keep their memories sharp, according to a recent study. Researchers at the University of California, Los Angeles, recorded the brain activity of people searching the Web and found that those with experience of the Internet used more of their brain during their searches. This suggests that simply searching the Internet has the effect of training the brain and keeping it active and healthy. Many studies have found that challenging mental activities such as puzzles can help preserve brain function, but few have looked at what role the Internet might play. According to Dr Gary Small, a UCLA expert on ageing, this is the first time anyone has simulated an Internet search task while scanning the brain. Dr Small’s team studied 24 normal volunteers between the ages of 55 and 76. Half were experienced at searching the Internet and the other half had no Web experience. Both groups were asked to do Internet searches and book reading tasks while their brain activity was monitored. The team found that people who are familiar with the Internet can engage at a much deeper level of brain activity. Script Video Task 3 Checking Your Comprehension Watch this part of the video clip again, and answer the following questions. Script 1. What sort of decisions do people make when searching online? Answer: “Should I go for this site or the other one?” 2. What is the major focus of Dr. Small’s new book? Answer: The digital divide. 3. Who are the digital natives, young or older people? Answer: Young people. 4. What should young people do to bridge the brain gap? Answer: Improve their face-to-face hu