下图是有关中国古代农业生产方式示意图,推断空缺方框中最可能填写的是( )
A:精耕细作
B:铁犁牛耕
C:封建土地私有制
D:自然经济
人口容量的特点不包括 ( )
—I will have an important test tomorrow. I feel stressed now.—__________ and believe youself. You will pass it.
农业生产潜力是指单位面积土地上每年所能获得的最大可能产量。下图是“我国农业生产潜力分布简图”,与我国南方大多数地区相比,甲地农业生产潜力较小原因是( )
As a famous dancer, she needs ____ (dance) for two hours every day.