题目

The light from the campfire brightened the darkness, but it could not prevent the damp cold of Dennis’s Swamp (沼泽地) creeping into their bones. It was a strange place. Martin and Tom wished that they had not accepted Jack’s dare. They liked camping, but not near this swamp.        “So,” Martin asked as they sat watching the hot coals. “How did this place get its name ? ”        “Are you sure you want to hear it ? It’s a scary story,” warned Jack.        “Of course!” cried out Tom. “If there were anything to be scared of, you wouldn’t have 20．先量出下面各角的度数，再写出它们分别是哪一种角．