When a Swedish ship that sank in 1628 was recovered from the port of Stockholm, historians

When a Swedish ship that sank in 1628 was recovered from the port of Stockholm, historians and scientists were overjoyed with the chance to examine the remains of the past. The ship construction showed how ships were built and operated during the seventeenth century. In this way, artifacts, objects made by human beings, provided a picture of daily life almost 400 years ago.
Underwater archaeology-----the study of ships, aircrafts(工艺品) and human settlements that have sunk under large bodies of water-----is really a product of the last 50 years. The rapid growth of this new area of study has occurred because of the invention of better diving equipment. Besides the Swedish ship wreck(残骸）,underwater archaeologists have made more exciting discoveries such as the 5000-year-old boats in the Mediterranean Sea.
Underwater archaeology can provide facts about the past. In ancient ports all over the world are ships sunken in the past 6,000 years. There are also sunken settlements in seas and lakes telling of people’s way of life and their systems of trade in ancient times.
Underwater archaeologists want to study these objects to add to the world's knowledge of history, but they have to fight two enemies. One enemy is treasure hunters who dive for ancient artifacts that they can sell to collectors. Once sold, these objects are lost to experts. The second enemy is dredging machines(挖掘机）often used to repair ports. These machines destroy wrecks and artifacts or bury them deeper under sand and mud. By teaching the public about the importance of underwater “museums” of the past, archaeologists are hoping to get support for laws to protect underwater treasures.
【小题1】What purpose does Paragraph 1 serve in the passage?A．To provide background information of the topicB．To attract readers' attention to the topicC．To use an example to support the topicD．To offer basic knowledge of the topic【小题2】The aim of underwater archaeology is to .A．explore water bodiesB．search for underwater lifeC．study underwater artifactsD．examine underwater environment【小题3】Underwater archaeologists are worried because .A．sea hunters have better diving equipmentB．their knowledge of world history is limitedC．dredging machines cause damage to the portsD．sold artifacts can hardly be regained for research【小题4】What is the main purpose of the passage?A．To introduce a young branch of learning.B．To discuss the scientists' problems.C．To explain people's way of life in the past.D．To describe the sunken ships.B

(答案→)B 解析：文章介绍了一个新兴的研究领域—水下考古【小题1】推理题。第一段的作用就是引起读者的兴趣，引出这个话题。【小题2】细节题。根据第二段第一行Underwater archaeology-----the study of ships, aircrafts(工艺品) and human settlements that have sunk under large bodies of water。【小题3】细节题。根据第三段第五行Once sold, these objects are lost to experts.可知sea hunters是水下考古的一大威胁。【小题4】主旨大意题。通读全文可知文章介绍了一个新兴的研究领域—水下考古。

对的，就是这个意思