Another vehicle is powered by solar panels and a wind turbine(涡轮机). It can stay afloat for months. The robotic vehicle sends information about the so­called biodiversity hotspots. A biodiversity hotspot is an area of an ocean that has a lot of plant and animal life activity. Lavinia Suberg is one of the scientists studying the biodiversity of the Celtic Sea. She says productive ocean areas, like the Celtic Sea, attract zooplankton. The zooplankton then attract fish. She adds that areas with a large increase of fish often attract sea mammals and birds.

　　Using these robotic ocean vehicles greatly reduces the cost of exploring the seas with manned laboratories. Scientists can spend more time analyzing the collected information. They say the research will give them a better understanding of the needsof the Celtic Sea for future management and protection.

　　文章大意：本文介绍两种水下自我探测器，它们用来勘探海底动植物。

　　4．Scientists go to the Celtic Sea to explore ________.

　　A．why this area appeal to sea animals

　　B．what the Celtic Sea really desires

　　C．whether the expense can be reduced

　　D．how this area can be better protected

　　答案：A　细节理解题。根据第一段最后一句话“Scientists want to know why sea animals are so attracted to this part of the Atlantic Ocean.”可知，选A。

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