单选题 The discovery of the ship is important to students of early ships and their routes because ______.

A、 the oldest surviving ship it is a valuable source of information
B、 it is a useful means of extending their existing knowledge
C、 its discovery has changed completely their existing ideas
D、 this provides the only information about early Mediterranean trading ships that has come their way

【正确答案】 B

【答案解析】[试题分析] 本题考查学生对细节的理解以及根据细节作推断的能力。
[详细解答] 文章第一段最后一句谈到了发现这艘古船的重大意义。“Its discovery and restoration have now thrown new light on the ancient trade routes and shipbuilding techniques．”这艘古船的发现和恢复使人们对古代的贸易航道和造船技术有所了解。由此，可推断对于研究古代船只的学生来说，它的发现可以扩宽他们已有的知识，故选B。选项A有很强的干忧性，但文章第一句提到“one of the oldest seafaring ship”，因此这艘船不是“the oldest surviving ship．”