问题
填空题
整数可以看作分母为1的分数,正整数、0、负整数、正分数、负分数都可以写成( )的形式。
答案
分数
整数可以看作分母为1的分数,正整数、0、负整数、正分数、负分数都可以写成( )的形式。
分数
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Most of these new people are born in developing countries. (2)_____ In the developed countries of Europe and North America, the population is growing very slowly. This is because women in these countries have, on average(平均), only one or two children. (3)_____ In the developing countries, more than one billion people already live below the poverty line (贫困线). (4)_____ Children get little or no time at school and suffer from many kinds of diseases. The UN has said that the world's population will reach 12.5 billion people by the year 2100. If the number makes your head spinning(眩晕), you're not alone. Many experts are worrying that so fast population growth could have very bad results. (5)_____ |