大学二年级上册创意阅读3 Unit 18 Eighteen.doc

1、Unit EighteenLasersWords to noteAccessible 8; acronym 5; cataracts 10; cervix 13; conspicuous 2; conventional 1; cornea 16; diabetes 6; diffused 11; emit 12; eradicate 18; glaucoma 14; impair 4; invasive 3; pivot 9; preferentially 17; retina 7; tackle 15Understanding the textPart A: True or falseSta

2、tementsF1. Lasers have been used in surgery for more than half a century.F2. LASER means Light Amplification by Stimulated Emission of Radiation.T3. Lasers have uses other than in medicine.F4. Laser beams are very good for cutting but not for sealing.F5. Diabetes is primarily a disease of the eyes.T

3、6. Lasers are particularly useful in treating cancers which are easy to get it.T7. Optical fibres can be used in conjunction with lasers.T8. Birthmarks respond well to laser treatment.F9. Laser surgery is riskier than the conventional kind.T10. Training in laser surgery is time-consuming. Part B: Co

4、mprehending the textAdvantages of Laser SurgeryReasonsBecause light waves in a laser beam have the same rhythm and are of the same wavelength.Because with lasers surgeons do not need to make large incisions or in some cases any incisions at all.Because they can seal or shrink leaking and abnormal bl

5、ood vessels and so prevent swelling of the retina.Because they can destroy diseased cells either directly or in conjunction with chemicals.Because optical fibres can carry laser beams around corners and direct them precisely at tiny areas with virtually no risk of damaging healthy cellsa useful tech

6、nique in ear surgery.Because being red, birthmarks absorb the laser beam very efficiently.Developing your skillsPart A: The structure of a text: further practiceSectionsFunctionsSection 1: Introductionparagraph 1paragraph 2background information about lasers and then introduces the focus of the text

7、lasers in surgery background information on lasers in surgery and introduces first theme: lasers in eye surgerySection 2: Bodyparagraph 3paragraph 4paragraph 5paragraph 6paragraph 7the benefits of lasers in treating eye problems, especially problem with the retinathe benefits of lasers in the treatm

8、ent of diabetes-related eye damagethe uses of lasers in treating different forms of cancerthe uses of lasers in ear surgerythe uses of lasers in cosmetic surgerySection 3: Conclusionparagraph 8warning about the length and expense involved in training in the use of laser techniques, relative to conve

9、ntional surgical techniquesPart B: Summary writing: further practiceLasers have a number of important applications in surgery. They are used to treat eye problems, especially with the retina and damage caused by diabetes. Lasers are also used for cancer, ear and cosmetic surgery. Training in using l

10、asers is a longer and more expensive process than in conventional surgical techniques.Extending your vocabularyPart A: Technical vocabulary (medicine)Words from the TextEquivalents 1. incision (paragraph 2)swelling (5)2. scalpels (paragraph 2)related to the eye (3) 3. ocular (paragraph 3)found (6) 4. complications (paragraph 3)additional problem (4) 5. distension (paragraph 4)a cut (1) 6. presented (paragraph 5)knives (2)2