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多重表文件和倒排文件都归属于 【3】 文件。
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A recent report on population trend conducted by the think (1) of the World watch Institute identifies signs of slowing growth in some countries. It says populations in 32 countries—all in the industrialized world—have stabilized because of declining birthrates. But in a handful of developing countries where population is slowing, the cause isn’t something to (2) , because more people are dying. This trend is called "population fatigue", and it’s beginning in many of the developing countries that have experienced (3) birthrates and sharp population growth for several decades. Governments in these countries are now having trouble dealing with feeding, housing and educating an increasing number of children, (4) at the same time confronting the falling water (5) , deforestation and soil erosion that rapid population growth brings. In these countries any new threat—infectious disease, drought or famine—can become a (6) crisis. AIDS is a case (7) . WHO estimates calculate that one-quarter of the adult population of Zimbabwe and Botswana are infected with the AIDS virus, (8) , these countries stands to lose at least one-quarter of their labor force in the next decade from AIDS alone, a situation (9) since the yellow fever swept through Europe in the 14’h century. Social unrest is also increasing in these countries. One example is the (10) conflict between the Tutsis and the Hutus in Rwanda, where population pressures reduced cropland (11) where it could no longer feed those who lived on it. Demands on the world fisheries and shared water resources are likely to spark similar conflicts. Already the waters of the Nile are so heavily used that little reaches the Mediterranean, so any increase in demand or (12) in allocation will also increase tensions. The bottom line is that human population growth is (13) to slow one way or the other. Developing societies will either recognize problems (14) the horizon and act to encourage smaller families — or unchecked births will have their (15) in rising death rates.
conclusive instead at length as a result survey in which persuasive target common enables an initial efficiently likely to regard particular Advertising agencies employ research for both strategic and evaluative purposes. Strategic research (1) the agency to better understand how consumers use a product or service and how they (2) the product or service. Strategic research also determines the types of people most (3) buy the product. That group of people is called the (4) market. Advertisers have limited budgets so knowing who is most likely to buy a (5) product helps them spend their advertising budget more (6) . Evaluative research is used after the advertising has run and seeks to determine how well consumers remember the advertising message and how (7) it was. Evaluative research is expensive, and (8) , many advertisers do not employ it. (9) , they try to measure the advertising’s effectiveness by analyzing sales results. Agencies use both qualitative and quantitative research methods. Agencies employ qualitative research to gain (10) understanding of the marketing situation. This research method uses open-ended questions that allow consumers to explain their values, beliefs, and behaviors (11) . Agencies use quantitative research to determine a final course of action. This type of research uses close-ended questions (12) answers are selected from a set list. This enables the researcher to determine the exact percentage of people who answered yes or no to a question or the exact percentage choosing answer a, b, or c. One of the most (13) quantitative research techniques is the (14) in which researchers use a questionnaire to gain information from a large group of people, called a sample. The findings provided by quantitative research are therefore (15) in a way that qualitative research cannot be.
In 1975 the Congress of the United States passed the Education of All Handicapped Children Act, a (1) document in special education that has since (2) numerous amendments. A 1990 amendment renamed the law the Individuals with Disabilities Education Act (IDEA). IDEA requires public schools (3) a free and appropriate education to all disabled children. The law also requires that all children with disabilities between the ages of 3 and 21 receive support services, such as (4) or physical therapy, (5) the type or seriousness of their disability. (6) the provisions of IDEA, schools must (7) all children with disabilities. To do this school officials provide each child with a comprehensive (8) conducted by teachers, the parents, and appropriate specialists, such as children with speech difficulties. IDEA also requires schools to give parents the opportunity to assist in the development and (9) of their child’s education plan. The plan specifies goals for the student’s education, methods to achieve those goals, and services to be provided. Each student’s education plan is reviewed (10) . To the maximum extent appropriate, a child with a disability must be educated with children who do not have disabilities. In addition, IDEA requires that older children with disabilities receive transition services to assist in the change from school to adult activities, (11) employment, continuing education, and finding a place to live. IDEA provides federal financial support for schools to develop special education programs. Other federal laws prohibit discrimination (12) disability. Section 504 of the Act of 1973 (13) discrimination against individuals with disabilities in public schools and any other federally supported programs. The Americans with Disabilities Act of 1990 ensures (14) for individuals with disabilities in all (15) life, including education, the workplace, transportation, and telecommunications.
数据的基本单位是 【2】 。
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