【单选题】Known _______ one of the four greatest ancient civilizations in the world, China is attractive _______ many foreigners.
【单选题】以下 类型的细菌遗传交换,必需以直接的细胞与细胞的接触为前提?
【单选题】______ is one of the 'Seven Wonders' of the ancient world. It's world-famous. [ ]
【单选题】Aeeorcling to the author, it was in the ancient times that people all over the world had access to newspapers.
【简答题】One of the seven wonders of the ancient world is a group of pyramids still (stand)______ in Egypt.