【单选题】根据下面内容,回答题: A group of scientists rowing toward the center of a lake saw something shocking. They turned back as fast as they could. What had they seen? The lake was boiling! The group was investigati...
【单选题】Passage Three A group of scientists rowing toward the center of a lake saw something shocking. They turned back as fast as they could. What had they seen.? The lake was boiling! The group was investig...