c. with a relatively stable cultivation area, china can achieve its desired total grain output target if the annual average increase rate of per unit yield is 1%.
在播种面积相对稳定的前提下,只要粮食单产年平均递增1%,就可以达到预期的粮食总产量目标。
results : (1) from all previous census results, the population has been increased continuously, but the annual average increase rate has presented decrease tendency.
结果:(1)从历次人口普查数字来看,山西省总人口数在不断增加,但年均增长率呈下降趋势;
results the tendency of the annual new registration in male is increased and the annual average increase rate is 4 21%, the statistical significant increased tendency is not found in female.
结果男性肺结核并发糖尿病患者新登记率呈上升趋势,年递增率为4 。 2 1% ,女性上升趋势未见统计学显着性;