题目

     Hundreds of years ago, a Roman army came north from England to make war on Scotland. The Scots, a brave people, love their country. They fought hard to drive the enemy out of Scotland. But there were too many of the Romans. It looked as if the Romans would win.One night, the leader of the Scots marched his soldiers to the top of a hill. “We will rest here tonight, my men,” he said, “Tomorrow we will fight one more battle①. We must win, or we will die.”They were all very tired. So they ate their supper quickly and fell asleep. There were four guards on duty, but they 电暖气接入电路时需用三孔插座，将用电部分连入电路的同时，也将金属外壳与________相连，它与其他家用电器间的连接方式为________．只将一个“220 V　800 W”的电暖气接入示数为的电能表所在的电路中，正常工作5 h，消耗电能________ kW·h，此时电能表示数变为．