题目

Genghis Khan remains to this day one of the most accomplished men. But there are no accounts of the events that surrounded his death and burial — only a mystery focused around an area known as the Forbidden Zone.Scientist Albert Lin was obsessed by the story of Genghis Khan. He decided to organize a tomb hunt. Some of his best friends were experts in various fields — UAV3 design, remote sensing, and geographic information systems — that could, if applied in combination, provide an old-fashioned archeological expedition with cutting-edge advantages. Not only that, but almost all of these 水是生命之源，我们应该了解水、爱护水资源。下列说法错误的是     A．水是由氢元素和氧元素组成     B．农业上用喷灌、滴灌代替漫灌 C．用过滤的方法可使硬水变软水   D．用蒸馏方法得到净化程度较高的水