内容简介
《英语听力教程》（ListenThisWay）主要适用于高等院校英语专业一、二年级学生，同时适合师专、教育学院、广播电视大学、成人高校英语专业学生。套教材共分6册，每册配有教师用书和6盒录音带。前面册以单项技能训练为主，配有一定量的综合训练，题材接近生活、工作实际，由近及远，涉及的面较宽；后两册以综合技能训练为主，同时针对中国学生在英语听力学习中的难点、重点进行反复训练，题材以反映社会、科技领域的新发展为主。教师用书的内容包括教学提示、练习答案和全部录音带内容的材料。 《英语听力教程5》为第五册，共包括12个单元，每单元分为6个部分。内容主要包括准备性练习、单项技能和相关微技巧训练、与本单元内容相关专题领域内的热门话题或科技发展介绍以及挑战性较强的真实录音材料练习。通过每单元的读、讲、听、说的综合训练，全面提高学生的英语听力水平。
目录
1 New Concepts of Health
Part Ⅰ Getting ready
Part Ⅱ Preventative medicine
Part Ⅲ Subhealth
Part Ⅳ More about the topic: Touch Therapy
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
2 New Developments in Medicine
Part Ⅰ Getting ready
Part Ⅱ Western medicine vs. holistic medicine
Part Ⅲ T-20
Part Ⅳ More about the topic: Fighting New versions of TB
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
3 Genetics ABC
Part Ⅰ Getting ready
Part Ⅱ Human chromosomes
Part Ⅲ Human genes
Part Ⅳ More about the topic: The Ethics of Genetic AdⅤancements
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
4 Safe Food?
Part Ⅰ Getting ready
Part Ⅱ Sugar
Part Ⅲ Good food?
Part Ⅳ More about the topic: Antibiotics & Livestock Production
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
5 Life Beqlins Every Morninq
Part Ⅰ Getting ready
Part Ⅱ Odor and aging
Part Ⅲ How to live to be 100 or more?
Part Ⅳ More about the topic: Computer Technology & Senior Citizens
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
6 Science & Fashion
Part Ⅰ Getting ready
Part Ⅱ Futures iridescent with high-tech fabrics
Part Ⅲ Discussing fashion
Part Ⅳ More about the topic: Computerized Shirt Could Save Lives
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
7 Roads & Ways Changing
Part Ⅰ Getting ready
Part Ⅱ Cellular phones & driving
Part Ⅲ Smart Card
Part Ⅳ More about the topic: Route 66 & Bill Shay
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
8 Rubblsh or Raw Materials?
Part Ⅰ Getting ready
Part Ⅱ An international recycling business
Part Ⅲ Domestic waste
Part Ⅳ More about the topic: Recycling vending Machines
Part Ⅴ Towards independent listening
Part Ⅵ Reminder of key points in this unit
9 Forced Labor or Uncomplainig Helper?
10 Computers:Machines of Litelligence
11 Entering the Internet
12 Review
摘要与插图
Shakespeare said "A rose by any other name would smell as sweet." Whenhe wrote that, he was obviously a young guy; our sense of smell changes as weget older. If youre over 40, you dont smell the way you used to. Were nottalking about your body odor; were discussing your nose."The decline tends to be gradual so many people arent aware of it. Sopeople become ... less able to detect very weak odors. They rate stronger odorsas being less intense than younger people would."
Marcia Pelchat is a biological psychologist at the Monell Chemical SensesCenter in Philadelphia -- an independent research institute devoted exclusivelyto the study of taste and smell. She says no one really knows why sense of smellchanges with age: "It may be a consequence of aging per se. It may also be a consequence ofsome factors that accompany aging, such as poor health ... or increased use fmedication."
To get to the bottom of how aging affects smell, Monell researchers go rightto the source -- the odor-detecting olfactory nerves. Marcia Pelchat explains:"Volunteers here in the Philadelphia area allow us to take a small ... amount oftissue from the nose, and from their tissue were able to isolate single olfactoryreceptor cells that take odors floating around in the environment ... and create anelectrical signal in the nervous system to go to the brain."
In the laboratory culture, the nerve cells of older persons were not as easilystimulated as were those of younger persons. Marcia Pelchat says this was borneout in her studies with people. When older people were exposed to a strong odor,they got used to it faster. It very quickly got to the point where they could notdetect it. Thats called adaptation, and Ms. Pelchat says its why many olderpeople do not smell certain things:
"For example, the warning odor in cooking gas wont be as noticeable ... toolder people as younger people. So older people would be less likely to noticegas leaks."
And then theres cross-adaptation, where certain smells, like that of vanilla,could actually make people less sensitive to the smell of roses. In younger people,says Marcia Pelchat, that never happens; but it may happen in roughly 20 percentof the elderly. Food is the most obvious area in which declining sensitivity tosmell among the elderly impacts real life:
"Most of the variety in food flavor comes from the nose... So without thesense of smell there is much less variety ... in food flavor."
