The tool is the laser and it is being used by more and more surgeons all over the world, for a very large number of different complaints. The word "laser" means: light amplification by stimulated emission of radiation. As we all know, light is hot, any source of light -- from the sun itself down to a humble match burning -- 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 produce beams that have a particular effect on certain living cells. It is now possible for eye surgeons to operate on the back of the human eye without harming the front of the eye, simply by passing a laser beam right through the eyeball. No knives, no stitches, no unwanted damage -- a true surgical wonder. Operations which once left patients exhausted and in need of long period of recovery time now leave them feeling relaxed and comfortable. So much more difficult operations can now be tried.
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. Altogether, tomorrow may see more and more information coming to light on the diseases which can be treated medically.
Which of the following would be appropriate to describe the instruments for surgical operations up until 1960s?
A.Traditional.
B.Complicated.
C.Remarkable.
D.Revolutionary.
第1题
县级以上地方人民政府设立的()负责本行政区域内的动物防疫条件监督执法工作。
A.兽医主管部门
B.动物疫病预防控制机构
C.动物卫生监督机构
D.食品安全办公室
第2题
A、动物卫生监督机构
B、县级以上地方人民政府兽医主管部门
C、农业部兽医局
D、兽医主管部门
E、地方人民政府兽医主管部门
第3题
负责动物、动物产品的检疫工作和其他有关动物防疫的监督管理执法工作是()
A、县级以上地方人民政府设立的动物卫生监督机构
B、各级畜牧局和动物卫生监督机构
C、县级以上地方人民政府设立的动物卫生监督机构和畜牧局
D、县级以上地方人民政府设立的动物防预站和畜牧局
E、县级以上地方人民政府设立的畜牧局和动物卫生监督机构
第4题
《动物防疫法》规定,县级以上地方人民政府设立的动物卫生监督机构,负责 ()、()的检疫工作和 () 工作。
第5题
A.县级以上地方人民政府设立的动物卫生监督机构
B.县级以上地方人民政府设立的动物防预站和畜牧局
C.县级以上地方人民政府设立的动物卫生监督机构和畜牧局
D.各级畜牧局和动物卫生监督机构
E.县级以上地方人民政府设立的畜牧局和动物卫生监督机构
第6题
县以上地方人民政府设立的()负责本行政区域内动物诊疗机构的监督执法工作。
A.兽医主管部门
B.动物卫生监督机构
C.动物疫病预防控制机构
D.兽药管理部门
第7题
A.负责动物的检疫工作
B.负责动物产品的检疫工作
C.有关动物防疫的监督管理执法工作
D.上述B.C.都是
第8题
A.监督管理
B.监督管理执法
C.监督检查执法
D.监督执法
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