最近，为解决北京市玉米市场存在的一些问题，我们进行了调研，总的情况如下：一、北京市玉米市场现状１９９８年，全市玉米需求总量约为１７．５亿公斤，分类如表：北京市玉米年产１２亿公斤左右，商品量约９亿公斤，需从外省采购８—８．５亿公斤。１９９８年全国玉米市... Recently, to solve some problems in the corn market in Beijing, we conducted a survey. The general situation is as follows: I. Status of the Corn Market in Beijing In 1998, the total demand for maize in the city was approximately 1.75 billion kg. The breakdown is as follows: The annual output of corn in Beijing is about 1.2 billion kilograms, and the volume of commodities is about 900 million kilograms. It needs to purchase 8-850 million kilograms from other provinces. National corn market in 1998 ...