题目

My swimming experience is extreme interesting. There was a time which I swam like a rock. This went on until one day when I was fishing with a friend at nearby pool. I fell into it. If my friend hadn’t come to rescue me, I would have been drowned. Ever since then, I have come to know the important of learning to swim. I didn’t attend to any training class but learn it on my own. Strange to say, I have no difficulty swim at all now. Though my self-invented styles look awkwardly, at least they can keep my floating. Thinking of this, I am more than satisfying.如图，图中的几何体是圆柱沿竖直方向切掉一半后得到的，则该几何体的左视图是（ ）A. B. C. D.