下列有关科学常识的表述，不正确的是( )。
A．月亮对海水的吸引力比太阳大，引起地球上潮汐现象的主要原因是月亮对海水的吸引力
B．世界著名的“死海”位于西亚，尽管“死海”的含盐量较高，但其中的营养物质也很丰富，“死海”中有大量的水生动植物
C．云和雾都是水蒸气达到饱和并凝结成细小的水滴而形成的，它们在本质上是相同的
D．“X射线”是一种波长比紫外线更短的光，它是由德国物理学家伦琴在1895年发现的
参考答案：B
解析： 死海位于约旦和巴勒斯坦交界，是世界上最低的湖泊，湖面海拔-422米，死海的湖岸是地球上已露出陆地的最低点。死海也是世界上最深的咸水湖、最成的湖，最深处380米，最深处湖床海拔一800米，湖水盐度达300g/L，为一般海水的8.6倍。死海湖中及湖岸均富含盐分，在这样的水中，鱼儿和其他水生物都难以生存，水中只有细菌和绿藻，没有其他生物；岸边及周围地区也没有花草生长，故人们称之为“死海”。故选B。
Remains of ancient civilization are places which were designed and built as a lasting tribute(致敬）to some individuals or events. By visiting these ______ monuments, you are sure to be amazed by how ____ the ancient civilization that existed centuries before you was. Some of the facilities which could be dated back hundreds of years ago are still in use today. Besides, you will also ______ at the mysterious stories behind it. The Great Wall, _____, is probably the best-known monument of China, which consists of a network of walls and towers through which the attack warnings could be received within minutes. _____ then had enough time to prepare. Estimates (估算）of the total length of the monument ______, depending on which sections are included and how they are measured. One of the _____ mysteries is that, although some of the wall is _____ in special radar images taken by satellites, astronauts have confirmed that the existing wall is not several thousand years old, nor is it, as many people had _____ visible to the human eye form outer space. Even older than the Great Wall of China is the Great Pyramid(金字塔）of Giza. Over a 20-year period, thousands of workers made the vision become ____ with numerous blocks, each weighing more than two tons. It’s still a(n) _____ to modern people how ancient men handled_____ of these giant stones in a time when cars or boats never existed some 4500 years ago. The pyramid served not only as a tomb for King Khufu, but also a place of _____ activity. The number of the God’s servants at that time showed the importance of such activities. After Khufu died, his body was carefully treated with various medicines and materials and was wrapped in order to be ____ for long. According to ancient Egyptian belief, the pyramid, where the mummy was placed, provided a place for the king to pass into the afterlife. Then his servants performed rituals(仪式）to bring _____ to the dead king’s soul, removing all the unrest and pain from his next life.
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