[填空题]我国粮食总产约____亿吨,人均占有量____kg,我国总耕地面积____亿hm2,人均耕地(0.08-0.09)hm2。黄淮海耕地占全国36.7%,人口占全国30.1%,水量仅占全国5.1%,人均占有水资源____m3,亩均仅____m3。