下图为亚欧大陆传统民居的墙壁厚度示意图,产生这种变化的原因是( )
A:获取建筑材料难易的程度
B:环保意识的差异
C:冬季气温的差异
D:降水的差异
Taste the _________, please.
—I can't agree more. Because we often have more than one choice.