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                      How to Be a Winner Sir Steven Redgrave Winner of 5 Olympic Gold Medals     “In 1997 I was found to have developed diabetes(糖尿病) . Believing my career was over, I felt extremely low. Then one of the specialists said there was no reason why I should stop training and competing. That was it—the encouragement I needed. I could still be a winner if I believe in myself. I am not saying that it isn’t difficult sometimes. But I wanted to prove to myself that I wasn’t finished yet. Nothing is to stand in my way.” Karen Pickering Swimm如图，闭合线圈上方有一竖直放置的条形磁铁，磁铁的N 极朝下。当磁铁向下运动时（但未插入线圈内部），（  ） A．线圈中感应电流的方向与图中箭头方向相同，磁铁与线圈相互吸引B．线圈中感应电流的方向与图中箭头方向相同，磁铁与线圈相互排斥C. 线圈中感应电流的方向与图中箭头方向相反，磁铁与线圈相互吸引D．线圈中感应电流的方向与图中箭头方向相反，磁铁与线圈相互排斥