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2017公共英語二級考試快速突破訓練題
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閱讀下列短文,回答題目.
Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bones or horns, metal knives and more recently, rubber and plastic. In the 1960s a new tool was developed, one which was, first of all, to be of great practical use to the armed forces and indus- try, but which was also to revolutionize the art and science of surgery.
The tool is the laser and it is being used by more and more surgeons all over the world. As we all know, light is hot, and any source of light will give warmth. But light is usually spread out over a wide area. The light in a laser beam, however, is concentrated. This means that a light with no more power than that produced by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinpoint-sized beam.
Experiments with these pinpoint beams showed researchers that different energy sources pro- duce beams that have a particular effect on certain living cells. It is now possible for eye surgeons to operate on the back of human eye without harming the front of the eye, simply by passing a laser beam right through the eye-ball. Operations which once left patients exhausted and in need of long period of recovery time now leave them feeling relaxed and comfortable.
The rapid development of laser techniques in the past ten years has made it clear that the future is likely to be very exciting. Perhaps some cancers will be treated with laser in a way that makes surgery not only safer but also more effective.
1.Which of the following would be appropriate to describe the instruments of surgical opera- tions up until 1960s?
A.Traditional.
B.Complicated.
C.Remarkable.
D.Revolutionary.
參考答案：A
參考解析：
答案及解析
A【解析】事實細節(jié)題。題干的意思是“以下哪個單詞能夠確切描述20世紀60年代以前的手術(shù)工具?”A選項的意為“傳統(tǒng)的”;B選項意為“復(fù)雜的”;C選項意為“非凡的”;D選項意為“革命的”。原文第一段提到幾千年前人們用石頭、牛角等做手術(shù)，由此可以推斷出選項A是正確的。
2.What do we find after the development of the laser in the 1960s?
A.Industrial revolution brought surgery changed greatly.
B.Medical help became available for industrial workers.
C.The study of art went through a complete revolution.
D.Human being's methods in surgery changed greatly.
參考答案：D
參考解析：D【解析】事實細節(jié)題。題干的意思是“20世紀60年代激光取得發(fā)展后我們可以發(fā)現(xiàn)什么?”根據(jù)原文第一段最后一句可知“激光為外科手術(shù)帶來革命性的變化”，故選D。
3.The reason why the laser beam is very strong is that_______
A. it is artificially illuminated
B.it is made up of a concentrated beam of light
C.it sends out heat in all directions
D.its heat is increased by the heat of the sun
參考答案：B
參考解析：B【解析】事實細節(jié)題。題干的意思’是“為什么激光束的能量比較強?”根據(jù)原文第二段最后一句可知“能量被集中到一起而變得強大”。故答案為B。
4.After the use of the laser beam, surgeons can perform operations which
A.leave their patients with negative effects
B.can treat only human eye diseases
C.do little damage to their patients
D.make their patients need a long time to recover
參考答案：C
參考解析：C【解析】事實細節(jié)題。題干的意思是“使用激光束做手術(shù)時醫(yī)生可以。文中第三段提到“曾經(jīng)一度讓患者疲憊不堪，并且術(shù)后恢復(fù)時間漫長的手術(shù)現(xiàn)在讓患者變得很輕松很舒服”，可以排除A和D。由文中最后一句“也許一些癌癥也能夠用激光來治療”可知B選項不正確。C選項意思為“使患者受到很小的傷害”。所以正確答案為C。
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