2013年12月四级听力模拟试题十二_大学英语听力

2013年12月四级听力模拟试题十二

　　26. What aspect of stress is the talk mainly about?

　　27. How can we deal with stress according to the doctor?

　　28. What will the doctor do in the next program?

　　Passage Two

　　Many people think that sitting is easier on their backs than standing or lifting. Not true. People whose jobs require them to sit for long periods of time suffer as much from back pain as people who lift all day long. Many world-class researchers believe that the huge increase in back pain over the past couple of decades and it is huge has a lot to do with the fact that more and more of us are spending our work days in chairs. A lot of people have the notion that, if their back pain gets bad enough, they can always resort to surgery. Nothing could be further from the truth. The amount of pain someone has has very little to do with whether or not he or she would benefit from surgery. One British researcher has estimated that for every 10,000 people who experience back pain, only four need surgery. Not very many years ago, back pain patients were routinely put to bed, sometimes for weeks or months. No longer. Two or three days of bed-rest is now the norm. After that, people are advised to return to their normal activities, gradually if necessary. The reasons for the 180shift are interesting. For starters, if you stay in bed, your muscle strength can decline by as much as three percent a day.