We know,the population problem has been the world's largest problem.By the year 2000,the world population reached 6 billion,over-population will bring us many problems,for example can cause traffic congestion,employment difficulty,and so on.At present,the development of China's family KouZhan four 5 of all over the world.We China's family planning policy,it is effective control the number of population,reduced the burden.
你可以再适当添点内容 We know,the population problem has been the world's largest problem.By the year 2000,the world population reached 6 billion,over-population will bring us many problems,for example can cause traffic congestion,employment difficulty,and so on.At present,the development of China's family KouZhan four 5 of all over the world.We China's family planning policy,it is effective control the number of population,reduced the burden.
你可以再适当添点内容