“不投喂”的罗非鱼长得快：鲈鱼塘混养罗非，罗非不用投料

Death rates over a nine year period were studied in 1,232 survivors of myocardial infarction. From 1973 to 1981, the 29 to 365 day case fatality rate in 28 day survivors dropped from 13.3% to 3.2%. This down-trend in case fatality was highly significant, averaging 14.3% in each year. After adjustmen... View More