题目内容
4. An X-ray examination ________ the cancer in his lung. Unfortunately it wasn’t done.
A) would locate B) will locate C) would have located D) will have located
C
Some wonderfully creative uses of X-rays have been in the world of art.But the most impressive one is to uncover what has been covered up.Details unfolded by an X-ray of a painting can ' t be seen any other way.For example, in the past, paintings were often repaired if small pieces of paint fell off the canvas (帆布). These repairs cannot be seen just by looking at the painting.It takes an X-ray to discover where the repairs have been made.
An X-ray of a painting is one of the best ways to tell if it was created by a famous painter or if it is a forgery(赝品).If there is a question as to whether an old master has painted a certain painting or not, X-rays are made and compared to those of paintings that are known to be original.If the brushstrokes (笔迹) , for example, are shown to be totally different than in other work done by a certain artist, then the painting is proved to be a fake copy.
Since modern paints are usually made from different materials than paints of hundreds of years ago, the image they leave on an X-ray film looks different.This is another way X-rays can be used to spot a forgery.A modem artist will try to make a forgery look hundreds of years old by painting dirty varnish on it or by using artificial means to get the varnish to look cracked.To the naked eye the forgery may look old, but when a careful study of the X-ray image is made, the deception is obvious.
It was common many years ago for an artist to finish a painting, decide it wasn't any good, and paint a completely different picture on top of it.Or artists would paint over others' work —it was their version of recycling.Taking an X-ray is the only way to find out if there is a picture underneath the picture you see with your eyes.Sometimes museums will be more interested in the painting beneath than the one on top, and will restore the older one by having the top layer painstakingly removed.
【小题1】What is the main purpose of the article?
A.To provide information to police who are looking for stolen art. |
B.To persuade art dealers to check for fake copies before selling art. |
C.To explain how modern technology can be applied in unique ways. |
D.To help artists restore damaged artwork to its original appearance. |
A.make repairs on paintings in the past |
B.identify the authenticity of an artwork |
C.change the materials of a forgery |
D.remove the recyclable paints |
A.comparison | B.drawback | C.trickery | D.judgement |
A.X-ray Detectives |
B.Creative Uses of Technology |
C.Forgery Studies |
D.X-ray Painting Techniques |
We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.
MONTAGNE: How many things emit radiation?
Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air.
So the extremes are uranium in the soil to bananas?
Yes.
By the way, why do bananas have radiation?
Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive
What’s the difference between radiation that’s harmful and not harmful?
Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer.
The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave.
So what then is the largest contributor of ionizing radiation?
For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements.
Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation?
I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life.
1.We can infer from the first paragraph that radiation is______.
A.rare |
B.powerful |
C.dangerous |
D.common |
2.The passage may be _______.
A.an interview |
B.an argument |
C.a talk show program |
D.a science report |
3.Whether radiation is harmful or not depends on______.
A.whether it has a small amount of potassium |
B.whether it changes chemical in materials. |
C.whether it has energy to change materials |
D.whether it is visible in life |
4.The purpose of writing this passage is to _______.
A.advise on how to protect us from radiation |
B.analyze what causes radiation in daily life |
C.warn people of the danger of radiation |
D.expect people not to fear everyday radiation |
I.词语识别(本题30小题,每小题0.5分,满分15分),
1) 下列有六组英语词组,请根据所给的英语单词或短语,选择其最合适的汉语解释,并将答案号码填涂在答题卡上。
Group 1
1. negative A.原则 2. reserve B.巧合 3. principle C.消极的 4. coincident D.提倡 5. advocate E.保护区 F.积极的 |
Group 2
6. drought A.灭绝 7. threat B.物种 8. extinct C.干旱 9. species D.威胁 10. habitat E.栖息地 F.习惯 |
Group 3
11. considerate A. 社区 12. conflict B. 订阅 13. community C. 冲突 14. adolescence D. 体贴的 15. subscribe E. 青少年时期 F. 考虑 |
Group 4
16. nutrition A. 产生 17. evolution B. 进程 18. fortnight C.营养 19. possession D.(生物)进化 20. come about E.两周 F. 所有物 |
Group 5
21. by and by A. 为了…的利益 22. all in all B. 转眼间 23. in a flash C. 不久之后 24. for good D. 总之 E.永远 |
2) 下列每小题A、B、C、D选项中,有其中一个选项的某个单词语法拼写不正确,或某个句子或短语的语法不正确,请将该项答案号码填涂在答题卡上。
25. A.an X-ray machine, an honest man, an 11-year-old school
B.a university,a useful tool, an unexplored area
C.an orange, an MP4 player, an one-legged table
D.an uncle, a boxer, a European, a UFO
26. A.healthier,friendlier,lonelier
B.cleverer, narrower,heavier
C. sadder, redder, fitter, thinner
D.bigger,hotter, more badly
27. A. They found him was knocked down. B.My dream has come true.
C. He’s working there. D.Mother cooked meals for them.
28. A.regretted, admitted, omitted B. preferred, occurred, referred
C. writting, trapping, slipping D.forgotten,fled,hidden
29. A. Never shall I forget it.
B. Had I known it,I would have told you.
C..No sooner had he arrived than the bell rang.
D.Seldom does he comes here.
30. A. with our lessons over
B.with his mother ill
C.with a strong wind blowing
D.with her head bent