农用地分等定级单元的划分方法有（）。
A.叠置法
B.地块法
C.网格法
D.多边形法
E.多核心法
参考答案：A, B, C, D
解析：
农用地分等单元的划分主要有以下几种方法。
（1）叠置法：将比例尺相同的土地利用现状图与地形图、土壤图叠加，形成的封闭图斑即为一个分等单元。若图斑小于上图面积（6mm2）则要进行归并。叠置法适用于土地利用现状类型多、地貌类型比较复杂的地区。
（2）地块法：在工作地图上用明显的地物界线或权属界线，将农用地分等因素相对均一的地块划分为一个分等单元。也可直接将土地利用现状图上的图斑作为分等单位。地块法适用于所有分等类型和地区。
（3）网格法：用一定大小的网格作为分等单元，网格大小以能区分不同特征的地块为标准，可采用大小均一的固定网格，也可采用大小不均一的动态网格。网格法适用于分等因素空间变化不复杂的地区。
（4）多边形法：将所有分等因素进行叠加，最终生成的封闭多边形即为分等单元。多边形法适用于所有分等类型和地区。选项E多核心法无此概念。
It was a bitter, 36 evening in northern Virginia. The old man’s beard was 37 by winter’s frost (霜)while he waited for a ride across the river. The wait seemed endless. Then he heard the weak sound of hooves(马蹄) advancing along the frozen path. 38 , he watched as several horsemen rounded the bend. He let the first one pass by, then another. As 39 rider drew near where the old man sat, the old man 40 the rider’s eye and said, “Sir, would you mind giving an old man a ride to the other side of the river?” Reining(勒住) his horse, the rider replied, “Sure thing.” Seeing the old man unable to 41 his half-frozen body from the ground, the horseman helped the old man onto the horse and took him to his 42 . On the way, the horseman said: “Sir, I notice that you let several other riders pass by. I'm 43 why, on such a bitter winter night, you would wait and ask the last rider.” The old man looked at the rider and replied, “I know people pretty good. When I 44 the eyes of the other riders, I immediately saw there was no 45 for my situation. But when I looked into yours, kindness and compassion(同情) were obvious. I knew that your gentle spirit would give me help in my time of 46 .” Those heart-warming comments 47 the horseman deeply. “I'm most grateful for what you have said,” he told the old man. “May I never get too busy in my own affairs that I fail to respond to the needs of others with kindness and compassion.”
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