英语视听说听力题.pdfVIP

Unit1 Since memory plays a significant role in our life, scientists are increasingly interested in research on how to improve memory. Here are some factors they believe to be important in expanding memory capacity. To begin with, you must take special care in your daily life. Food for example, is very important. Some vitamins are essential for your memory to work properly. They are found in bread, cereal, vegetables and fruits. Some experts say that synthesized vitamins improve memory, but others have doubts about this, arguing that the studies have not confirmed they do work. Another essential factor is water. It helps to maintain the memory systems, especially in older persons. According to Dr. Rosewell, lack of water in the body has an immediate and strong effect on memory; it can cause confusion and other thought difficulties. Sleep also plays a significant role. To be able to have a good memory, we must allow the brain to have plenty of rest. While sleeping, the brain no longer controls the senses, and starts to revise and store the information one has received. Lack of sleep would make one feel exhausted and would weaken ones ability to concentrate. Also, ones ability to store information would be affected. Unit2 Harvard University is the oldest institute of higher learning in the United States. Founded 16 years after the arrival of the Pilgrims at Plymouth, the university has grown fro 9 students with a single master to the present enrollment of more than 18, 000 students, including undergraduates and students in 10 graduate and professional schools. Over 14, 000 people work at Harvard, including more than 2,000 faculties. Harvard has produced six presidents of the United States and 34 Nobel Prize winners. During its early years, Harvard offered a classic academic course based on the model of English universities, but consistent with the prevailing Puritan philosophy. Although many of its early graduates beca