题目内容
If you find some questions difficult, leave out you don’t understand.
A.these B.the ones C.ones D.them
B
Sharks have lived in the oceans for over 450 million years, long before dinosaurs appeared. There are now about 360 species of sharks, whose size, behavior, and other characteristics differ widely.
Every year, we catch and kill over 100 million sharks, mostly for food and for their fins. Dried shark fins are used to make shark fin soup, which sells for as much as $50 a bowl in fine Hong Kong restaurants. Other sharks are killed for sport and out of fear. Sharks are vulnerable(易受伤的) to overfishing because it takes most species 10 to 15 years to begin reproducing and they produce only a few offspring(后代).
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 shark 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(海洋的) 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(非受挑衅而发生的)attack by a shark are about 1 in 100 million. You are more likely to be killed by a pig than a shark and thousands 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(白内障). Understanding why can help us improve human health. Chemicals taken from shark cartilage(软骨)have killed cancerous tumors in laboratory animals, research that someday could help prolong your life.
Sharks are needed in the world’s ocean ecosystems. 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.
【小题1】Which of the following is NOT a reason why people kill sharks?
A.People kill sharks for food. |
B.People kill sharks for sport. |
C.People kill sharks out of fear. |
D.People kill sharks because they often attack swimmers. |
A.There are many different species of sharks, but only a few of them are dangerous to humans. |
B.Sharks never get ill. |
C.Sharks are a valuable resource for human. |
D.Sharks play an important role in the ocean ecosystem. |
A.movies have given people the wrong impression of sharks |
B.most sharks are dangerous to humans |
C.sharks will attack anyone who is wearing black |
D.it is dangerous to swim in the ocean |
A.save | B.protect | C.lengthen | D.improve |
A.Are Sharks Dangerous? | B.Sharks And Humans |
C.Sharks: Humans’ Friends | D.Sharks Help Save Human Lives |
Computer hackers(黑客)have now got their hands on mobile phones. A phone virus(病毒)program can 36 your phone do things you have no control over, computer security experts 37 .
It might 38 the White House or the police, or forward your personal address book to a marketing company.
Or it could simply eat into the phone’s operating software, turning it 39 and erasing your personal information.
Similar viruses have already made mobile phone owners 40 in
Mr Hypponen, chief technical officer of a computer security in Fin-land said a virus “can get your 41 and send them somewhere else. And it can record your 42 .”
Mobiles are now able to surf the net, send e-mails and 43 software. So they are easy 44 for the same hackers who have sent viruses to computers over the past decade.
“It’s technically 45 now,” said Stephen Trilling, director of re-search at anti-virus 46 .
“If the phone is connected to the 47 , it cant be used to transmit threats and 48 just as any computer can. ”
In
So phone operators had to 51 emergency calls until the 52 was removed.
In Europe, mobile’s short message service, 53 ,SMS, has been used to send codes that could damage 54.
Mobile users can 55 virus, of course, by sticking to their traditional phones without Web links, some experts said.
36. | A.get | B.force | C.make | D.damage |
37. | A.speak | B.talk | C.tell | D.say |
38. | A.lead | B.cause | C.control | D.call |
39. | A.off | B.out | C.down | D.on |
40. | A.interested | B.angry | C.excited | D.terrified |
41. | A.messages | B.passages | C.news | D.information |
42. | A.voice | B.passwords | C.music | D.address |
43. | A.make | B.destroy | C.download | D.develop |
44. | A.jobs | B.tasks | C.subjects | D.targets |
45. | A.impossible | B.possible | C.useful | D.valuable |
46. | A.hardware | B.software | C.computer | D.equipment |
47. | A.computer | B.television | C.Internet | D.radio |
48. | A.strike | B.visit | C.hit | D.attack |
49. | A.in | B.by | C.on | D.with |
50. | A.send | B.dial | C.count | D.press |
51. | A.cancel | B.ban | C.stop | D.prevent |
52. | A.bug | B.mistake | C.fault | D.e-mail |
53. | A.and | B.nor | C.or | D.but |
54. | A.recorders | B.computers | C.TVs | D.phones |
55. | A.stop | B.avoid | C.kill | D.find |