.是阅读题.
Influenced by movies and popular novels,most people see sharks as people-eating monsters.This is far from the truth.Every year,a few types of sharks injure about 100 people worldwide and kill about 25.Most attacks are by great white sharks,which often feed on sea lions and other marine mammals .They sometimes mistake human swimmers for their normal prey,especially if they are wearing black wet suits.
If you are a typical ocean-goer,your chances of being killed by an unprovoked attack by a shark are about 1 in 100 million.You are more likely to be killed by a pig than a shark and thou sands of times more likely to get killed when you drive a car.Sharks help save human lives.In addition to providing people with food,they are helping us learn how to fight cancer,bacteria ,and viruses.Sharks are very healthy and have aging processes similar to ours.Their highly effective immune system allows wounds to heal quickly without becoming infected,and their blood is being studied in connection with AIDS research.
Sharks are among the few animals in the world that almost never get cancer and eye cataracts .Understanding why can help us improve human health.Chemicals extracted from shark cartilage have killed cancerous tumors in laboratory animals,research that someday could help prolong your life.
Sharks are needed in the world’s ocean ecosystem.Although they don’t need us,we need them.We are much more dangerous to sharks than they are to us.For every shark that bites a person,we kill one million sharks.
61.The word "prey" in Line 5 of Paragraph 1 is closest in meaning to _
[A] friends [B] enemies [C] food [D] suits
62.The passage mainly discusses __
[A] the number of people being attacked by sharks
[B] the benefits of sharks to improving human health
[C] the dangers sharks have brought to human beings
[D] the relationship between sharks and human beings
63.It can be inferred from the passage that ___
[A] most sharks are dangerous to human beings
[B] sharks only attack someone in black wet suits
[C] movies and popular novels are always misleading
[D] sharks are a valuable resource for human beings
64.According to the passage,we need sharks because of the following except __
[A] they are delicious food for us
[B] they are companions of human beings
[C] they can help rescue human beings
[D] they can help improve human health
65.By the second sentence of Paragraph 2,the author means to show that __
[A] pigs attack human beings more frequently than sharks
[B] people get hurt much more easily in a car accident
[C] people get killed more easily by pigs or car accident than by sharks
[D] sharks rarely kill human beings when they are not provoked to do so