Highly intelligent, the whales use different sounds to communicate and find their way. Belugas are also among the smallest kinds of whales.

　　More than 210 belugas, including about 31 in the United States, live in aquariums and zoos around the world. The Georgia Aquarium has asked for permission to bring 18 more belugas into the United States. Since some whales had been captured off the coast of Russia, the National Oceanic and Atmospheric Administration(NOAA) was considering the aquarium's request.

　　A law called the Marine Mammal Protection Act says the animals can only be brought into the country and put on display if they are captured without being hurt and there is an educational reason for doing so.

　　Georgia Aquarium officials said another 18 belugas would help people learn more about the species and allow scientists to better understand how to protect it. The aquarium would also breed the whales so U．S. aquariums could continue to display them. "When we study and observe belugas, we can gain a better understanding of their biology and diseases that affect them, and learn how to aid populations in their natural habitats，" said William Hurley, Georgia Aquarium's chief zoological officer. "Much of this research would be impossible to do in the remote locations and extreme climates where the animals live." The Georgia Aquarium would own 18 more belugas and would loan some to aquariums across the country.

　　Some scientists including Lori Marino, a beluga whale expert at Emory University, in Atlanta, Georgia, felt strongly that the whales belonged to the ocean instead of tanks. These scientists said the whales are being used for entertainment rather than for education, and having them in aquariums was not necessary for the species to survive. "Captive belugas, like dolphins and other whales, do not do well in tanks; they belong to the oceans，" Marino suggested. "Not only is it unfair to the belugas but there is no educational value in putting captive dolphins and whales on display. Students learn about dolphins and whales best when they see and read about them in their natural habitats."

　　语篇导读　本文讨论了白鲸养在水族馆供展览的利弊。

　　5．How do belugas send information to each other?

　　A．By swimming together.

　　B．By making body contact.

　　C．By using different sounds.

　　D．By using their sense of smell.

解析 C　细节理解题。根据第二段第一句可知，白鲸通过不同的声音来交流和辨别