多选题Why is it so difficult to salvage Nanhai One by the holistic approach ?多选题How many pieces remained of the1,000,000 pieces of Tek Sing’s cargo?多选题Which is NOT true about the Shenhai Yongshi (deep sea warrior) and the Jiaolong?多选题Compared with Europe and United States, how about the development of Underwater Archeology in Asia ?多选题Where was the ship“Batu Hitam”made?多选题Why did Michael Hatcher break the Tek Sing’s cargo ?多选题What is NOT the achievements of 2001 Convention?多选题When was the Nanhai One discovered?多选题Why does The successful salvage of the Batu Hitam wreck remain controversial?多选题When was the Nanhai One salvaged?多选题Which was the most dangerous part of the project ?多选题Which of the following may NOT be included as underwater cultural heritage?多选题Which of the following is true about the research objects of Underwater Archaeology? .多选题In the following statements which one was not a contribution to China’s archaeology personnel preparation?多选题1.Which one is NOT true about underwater heritage?