问题描述：
小明游览我市南禅寺妙光塔时，利用一根细棉线和一个小铁球，对一根立柱是否竖直展开实验探究，现象如图甲、乙所示．相对于立柱底端而言，该立柱顶端（ ）
A. 略向西南方向倾斜
B. 略向东南方向倾斜
C. 略向西北方向倾斜
D. 略向东北方向倾斜
最佳答案： 长方体的物体竖直放置时，重垂线挂在顶端，重垂线和物体边缘平行；长方体物体倾斜放置时，重垂线下面的小球偏向倾斜的一侧．
由题干甲图知，物体向南倾斜，由乙图知，物体向东倾斜，所以向东南倾斜．
故选B．
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