Since its invention 100 years ago, plastic , the superstar of the technological age, has become ugly and ungreen . But that’s about to change. An exhibition at London’s Science Museum this week could put it back on the cutting edge of science.
Have you ever hesitated in donating blood? The invention of “plastic blood” might make you feel better.
British scientists are working on the artificial blood as a replacement for real blood in emergency situations. It is made of plastic molecules(分子 ) and can join oxygen and transport it around the body. As a red, honey-like glue , plastic blood can be carried around conveniently . You just add water to make as much blood as you need.
The cells of our body are strict about what molecules the let in and out . For example , if we inject protein or DNA directly into the body, our immune ( 免疫 ) SYSTEM WILL DESTROY IT BEFORE IT REACHES THE CELLS.
To get around this , a British scientist has created drug-carrying plastic balls that fool the body into thinking they are natural. Once inside the cell, their contents are spread out through a small controlled explosion.
Skin transplants are widely done these days. But removing a piece of skin from, say , the bottom to plant it on the face can hurt and be troublesome.
The British company, Celltran, is working on plastic skin. Using plastic, they plan to take a small piece of the patient’s skin and grow it into an extra lay of skin on top of the plastic. a
The plastic feels similar to skin, so skin cells like to grow on it. The plastic then gradually disappears, without any reaction or infection .
1. What would be the best title for the text?
A. The superstar of technological age
B. An exhibition at London’s Science Museum
C. No more “white pollution”
D. Plastic takes on a new life
2. Which of the following will be on display at the exhibition at London’s Science Museum?
A. Plastic cells B. Plastic skin
C. Plastic molecules D. Plastic transplants
3. The phrase “get around “ in Paragraph 5 means closest to ______.
A. overcome B. end C. ensure D. pass
4.Which of the following is true according to the text?
A. Plastic blood will be injected into the body in drug-carrying plastic balls
B.The plastic skin will remain a part of the new skin
C. Plastic blood will take the place of real blood
D. Plastic blood contains a lot of water
第四节完型填空：（共20小题，每小题1.5分，共30分）
Recent studies show that only one out of three people have strong and healthy self-confidence . That ____26 two out of every three people simply don’t know the ____27 they already have to be successful when it’s _____28 there in their hands!___29 if you want others to believe in yourself first. Rememer: “ No one can ask you feel inferior unless you _____30them.” A successful businessman says, “you can’t push anyone up a ladder____31 he knows he can climb himself.”
Many of us have an image____32 , the image we have of ourselves. ___33one guy put it: “You can’t win horse race if you think you look_____34 on a horse.” To succeed, the first person you have to ____35 is yourself! So stop believing your own lies about yourself. Just ____36 your mind and you will change your life.
One of the most harmful weapons that can kill you success in life are the two little words: “____37”You know that people used to ____38 that if human being s traveled faster than 30 miles an hour it would ____39 our circulation of blood and kill us?Thank goodness a few people didn’t believe that ___40 thinking, or we wouldn’t be riding in cars , buses, and flying in airplanes today. You’ll never know until you____41.
Roger Bannister was the first human being to run a mile in less than 4 minutes. But _____42 he did it, most people in the would didn’t think it was even _____43. Yet only weeks after Bannister did it , suddenly _____44 all over the world began running a mile in less than 4 minutes! If we believe something can be done, we’ll _____45 do it.
26 .A. means B. reflects C. reads D. explains
27. A. chance B. strength C. ability D. reason
28. A. immediately B.properly C. accurately D. right
29. A. Because B. But C. What D. While
30. A.let B. challenge C. admit D. make
31. A. if B. except C. until D. unless
32. A.quiz B.question C. problem D. mystery
33. A. When B. As C. While D. Since
34. A. curious B. good –looking C.serious D.funny
35. A. beat B. knock C. strike D. defend
36. A. settle B. bend C. change D. fix
37. A. I failed. B. Not me. C. Can I？ D. I can’t
38. A. imagine B. think C. suspect D. doubt
39. A. start B. help C. stop D. quit
40. A. silly B. empty C. reasonable D.terrible
41. A. judge B. realize C. understand D.try
42. A. after B. before C. since D. because
43. A. likely B.unbelievable C. possible D. impossible
44. A.workers B. runners C. competitors D.players
45. A. simply B. seldom C. always D. usually
. I was _____lost in the English Evening last night. There was nothing like it.
|
A．thoroughly |
B．partly |
C．apparently |
D．constantly |
. The English spoken in England is only slightly different from_____ spoken in Canada.
|
A．which |
B．what |
C．that |
D．the one |
Once a decision has been made, all of us should ____it.
|
A．direct to |
B．lead to |
C．stick to |
D．refer to |
Only then, _____we ____that the trapped miners were in danger when the flood water dripped into the tunnels.
|
A．have; realized |
B．did; realize |
|
C．do; realize |
D．had ; realized |
