大学英语第四册第二单元课后习题答案.doc

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1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流大学英语第四册第二单元课后习题答案.精品文档.Unit 1 Text ALanguage Sense Enhancement1. care 2. impact 3. orbiting satellites 4. warn of 5. location 6. at any given time 7. vibrate 8. detected 9. calculate 10. convertedLanguage FocusVocabularyI.1. 1) expansion 2) automated 3) vapor 4)take control

2、 of 5) hazards 6) satellite 7) vibrated 8) magnetic 9) bunched 10) in the air 11) got/was stuck in 12) approximately 2. 1) send out 2) stand up for 3) pass for 4) were closing in on 5)starting up 6)went through 7) fill out 8) fall into 3. 1) incorporates all the latest safety features 2) two trees t

3、en feet apart 3) awarding lucrative contracts to his construction firm 4) the prototype of a new model before they set up a factory to make the cars 5) are correlated in all racial groups4. 1) the application/ has turned into a reality/ are poised to2) that vibrate/can detect/frequency 3) lanes/are

4、mounted in/alert a /hazard II. Word FormationClipped Words: kilogram/memorandum/gymnasium/liberation/doctor/veterinarian/preparatory/ automobile/influenzaBlends: medical care/electronic mail/communications satellite/news broadcast/sky hijack/ European dollar/breakfast and lunch/television broadcast/

5、Oxford and CambridgeIII. Usage1) swimming pool 2) drawing board 3) enriched Middle English 4) disturbing change 5) fully developed prototype 6) canned food 7) working population 8) puzzling differencesComprehensive ExercisesI. 1. 1) computerized 2) start up 3) be poised to 4) alert 5) hazards 6) mon

6、otonous 7) take control of 8) steer 9) lane 10) decrease 11) calculate 12) getting stuck in 14) mounted 15) detect 16) vapor2. 1) generates 2) related 3)revolutionized 4) enable 5) opportunities 6) overall 7) manufacturing 8) dependent 9) interact 10) fatalities II. 1. 1) There was an unusual quietn

7、ess in the air, except for the sound of artillery in the distance.2) The expansion of urban areas in some African countries has been causing a significant fall in living standards and an increase in social problems3) The research shows that atmospheric carbon dioxide levels are closely correlated wi

8、thglobal temperatures4) The frequency of the bus service has been improved from 15 to 12 minute recently.5) The diver stood on the edge of the diving board, poised to jump at the signal from the coach.2. Automobiles have, since their invention, revolutionized transportation, changing forever the way

9、 people travel, and do business. On the other hand, they have brought hazards, especially highway fatalities. However, today the application of computer technology and electronic sensors in designing and manufacturing cars makes it possible to eliminate most of traffic accidents. For example, electr

10、onic sensors mounted in your car can detect alcohol vapor in the air and refuse to start up the engine. They can also monitor road conditions by receiving radio signals sent out from orbiting satellites and greatly reduce your chances of getting stuck in traffic jams.Text B Comprehension Check 1. a

11、c c d b bTranslation 1. 这类系统易受气候变化的影响， 提供的数据不够精确，但他们不需要特别的道路设施，只需要将车道标志维护好就行了。2. 然而，不用多久，其成本就能为广大车辆拥有者和驾驶者所接受，尤其是目前不少可以应用的技术已经走向市场，开始了批量生产。3. 电子驾驶应用的最大障碍可能在于人们普遍认为认为这一技术的应用比实际情况更困难，更昂贵。4. 考虑到这些运用安全自动化交通运输系统的经验，开发由自动控制系统操纵的公路车辆算不上什么大的飞跃。Language Practice1. c a e b f g d h2. 1) en route 2) matures 3) equivalent 4) feasible 5) in cooperation with 6) exposure 7) at the start of 8) thereby 9) implemented 10) realistic 11) component 12) by means of