6.1 Introduction: the problem of providing nutrition information Developments in nutrition research and improved scientific understanding of the relationship between diet and health have led to increasing interest in the nutri￾tional aspects of the food supply. This interest is shared by academics, health professionals, government officials, consumers and the food and supplement industries alike, although not always for the same reasons and generally at dif￾ferent levels of knowledge and understanding. Interest in nutrition, in respect of both total diet and individual foods, is second only to concern about food safety

一、信息、地理信息 1、信息和数据 信息（Information）是用文字、数字、符号、语言、图像等介质来表示事件、事物、现象 等的内容、数量或特征，从而向人们（或系统）提供关于现实世界新的事实和知识，作为生 产、建设、经营、管理、分析和决策的依据。信息具有客观性、适用性、可传输性和共享性 等特征。信息来源于数据（Data）

I. Market Failure Market Power Externalities Public Goods Incomplete Information II. Rent Seeking III. Government Policy and International Markets

You are going to hear some sentences telling you the 12 most populous countries in the world. Listen carefully and supply the missing information. Pay special attention to the numbers

Background Information Introductory Remarks Read & Answer Text & New Word Reading Intensive Study Exercise Check-up Assignment

An understanding of the nature of wastewater is essential in the design and operation of collection, treatment, and reuse facilities, and in the engineering management of environmental quality. To promote this understanding, the information in this chapter is presented in eight sections dealing with (1) an introduction to the constituents found in wastewater

1 What do I have to do? （1)Background information （2)phrases and sentences

Copyright 8 1997 by Noyes Publications No part of this book may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system, without permission in writing from the Publisher. Library of Congress Catalog Card Number: 96-29055 Printed in the United States

Thematic Analysis: Outside Communications Receive Replacement Personnel or Visitors Receive Information F rom Outside Receive Mail or Fax From Friends or Family I Write, Fax, or Telephone t o Friends or Family

Background Information Organization of the Text Introtuctory Exercise Text & New Word Reading Intensive Study Exercise Check-up Assignment