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  3. The advantages and disadvantages of a large population have long been a subject of discussion among economists. It has been argu

The advantages and disadvantages of a large population have long been a subject of discussion among economists. It has been argu

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问题     The advantages and disadvantages of a large population have long been a subject of discussion among economists. It has been argued that the supply of good land is limited. To feed a large population, inferior land must be 【B1】______ and the good land worked 【B2】______. Thus, each person produces less and this means a 【B3】______ average income than could be obtained with a smaller population. Other economists have argued that a large population gives more 【B4】______ for specialization and the development of 【B5】______ such as ports, roads and rail ways, which are not likely to be built unless there is a big demand to 【B6】______ them.
    One of the difficulties in carrying out a 【B7】______ birth control program lies in the fact that official attitudes to population growth 【B8】______ from country to country depending on the level of industrial development and the availability of food and raw materials. In the developing country where a vastly expanded population is pressing hard upon the limits of food, space and natural resources, 【B9】____________. In a highly industrialized society the problem may be more complex. 【B10】____________. When the pressure of population on housing declines, prices also decline and the building industry is weakened. Faced with considerations such as these, 【B11】____________.
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答案cultivated
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