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一位男士晨练,发现一件怪事。一只大黄狗冲着一个开关箱狂吠。这个开关箱位于两根水泥电杆中间。开关箱是用钢板焊接而成的,高约1m、宽约0.8m、深约0.6m、下沿离地面高度1.2m,用60×60×4的角钢支架固定在地上,箱门上着锁。与开关箱连接的有5条电缆,沿电杆引向上方。这位男士颇为奇怪！莫非开关箱里有人?不可能。因为人进不去,就算进去了也不能待啊！莫非有老鼠之类的小动物钻进去了?也不可能。因为开关箱密
A man morning exercise, found a strange thing. A rhubarb dog barked at a switch box. This switch box is located in the middle of two cement poles. The switch box is made of welded steel plate, about 1m high, 0.8m wide and 0.6m deep, with a height of 1.2m from the ground and a 60 × 60 × 4 angle steel bracket fixed to the floor . There are 5 cables connected to the switch box, leading up the pole. This man is quite strange! Could someone switch box? Impossible. Because people can not get in, even if can not go in! Could a small animal like a mouse got into it? Not possible. Because the switch box close