共用题干 False Fear of Big FishMany people believe sharks(鳖鱼)are erous and will always try to hurt or even kill humane. _________A shark exhibition at the National Aquarium(水族馆)in Baltimore,Us,proves this. Visi- 'tors can touch young sharks, see their eggs develop and watch a dozen different species swim smoothly around a huge tank.Most people fail to realize that shark attacks don't happen very often.Humans are more likely to bekilled by lightning than by a shark．_____________(47)There,kids can learn,from an early age,not to fear sharks."People fear what they don't know,"said Nancy Hotchkiss,an organizer of the exhibition."Sharkshave been around for 400 million years and they play an important role in the ocean's food chain.We want people to discover that sharks are amazing animals that need our respect and protection．___________(48)A study,published in January in the US magazine,Science;found that almost all recor-ded shark species have fallen b夕half in the past S to 15 years.Thousands of sharks are hunted in Asia for special foods, such as shark fin(鱼翅)soup. And many others get caught in nets , while fishermen are huntinaother fish. __________(49)"Some fishing methods are actually cleaning out the ocean for sharks,',said Dave Schofield,the manager of the aquarium's ocean health programme._______________(50) _________