一天,A县的张县长正沿着大街散步。走着走着,他便走到了一座大楼下面。张县长立刻变得小心谨慎起来,迅速将头高高仰起,把一双眼睛死死盯在那座楼的楼顶上,以防从上面掉下什么东西来伤着自己。张县长注意力全集中在上面了,必然也就忽略了脚底下。所以,当他的一双脚将地上的草坪 One day, Zhang County Chief A is walking along the main street. Walking, he walked under a building. Zhang magistrate immediately became cautious, quickly raised his head high, with a pair of eyes staring at the roof of the building to prevent falling from something above to hurt himself. Zhang county chief focus on the above, it will inevitably ignore the foot. So, when one of his feet will be on the ground lawn