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1、Keys to the Exercises（练习答案）Unit 1EXERCISE 11. T 2. F 3. F 4. T 5. F 6. TEXERCISE 21. 内燃机 2. a reciprocating engine 3. 废气排放 4. fuel consumption 5. 燃油经济性 6. combustion chamber 7. 混合动力汽车 8. mass production 9. 双燃料汽车 10. air-cooled engine EXERCISE 31. A diesel engine 2. internal combustion engine 3. dies
2、el engine 4. converts into5. in a reciprocating engine 6. engine 7. four strokes cycle 8. electric enginesEXERCISE 41. C 2. F 3. A 4. B 5. E 6. DEXERCISE 51. diesel engines, in many respects, work in the same way as gasoline engines2. makes the car and the truck move3. every time it was required to
3、stop the car4. Some of parts make the car more comfortable or better looking5. if allowed to remain in the engineEXERCISE 61. years 2. solve 3. basically 4. exhaust pipe 5. without 6. benefited 7. based on 8. in the 80s 9. runs out 10. the right sideEXERCISE 71. D 2. G 3. A 4. J 5. B 6. H 7. C 8. F
4、9. E 10. IEXERCISE 81. 代用燃料汽车 2. 高科技汽车 3. 混合动力电动汽车 4. 在节气门上方 5. 发动机控制系统 6. 发动机控制模块EXERCISE 91. 1）that is stopping oil from circulating 2）The engines valve lifters are collapsed 2. 1）The engine may have mechanical problems2）The engines piston rings may be wornUnit 2EXERCISE 11.T 2.F 3.T 4.F 5.F 6.FEX
5、ERCISE 21.汽油(发动)机 2. in low-speed driving conditions 3. 达到各种不同的目的 4. higher energy density 5. 电动机 6. air conditioning 7. 反馈制动 8. power source 9.资源消耗 10. dashboard displayEXERCISE 31.convertsinto 2. shut off 3. hybrid electric vehicles 4. transmission 5. slow down 6. generator 7. the most efficient o
6、peration 8. current standard vehiclesEXERCISE 41. B 2.D 3. A 4. E 5. CEXERCISE 51. reflect the spirit of the time 2. electric motors, steam engines and internal combustion engines3. a speed and power changing device4. reducing fuel consumption, lowering exhausted emissions, and reducing engine noise
7、5. are increasingly becoming more prevalentEXERCISE 61. W12 engines 2. three cylinders 3. rear wheel drive 4. at an average speed 5. currently 6. based on 7. camshafts 8. Due to EXERCISE 71. C 2. E 3. A 4. J 5. B 6. H 7. D 8. F 9. G 10. IEXERCISE 81.可变气门相位和升程电子控制装置 2.上止点 3.每分钟转数 4.单顶置凸轮 5. 双顶置凸轮 6.
8、下止点 7.前置发动机前轮驱动 8. 混合动力汽车EXERCISE 9 1.1） the same air pressure 2）linkage2.1）out of alignment 2）out of adjustment Unit 3EXERCISE 11. T 2. F 3. F 4. F 5. T 6. FEXERCISE 21. 气门机构 2. pushrod engine 3. 气门弹簧 4. timing chain5. 气门锥面 6. steel alloy 7. 气门座8. timing belt 9. 挺柱 10. at high engine speedEXERCISE
9、31. valve 2. valve train 3.intake and exhaust ports 4. valve face 5. push rods 6. rocker arm 7. camshaft 8. valve springEXERCISE 41. C 2. A 3. D 4. E 5. B 6. FEXERCISE 51. transmit the force from the camshaft to the pushrods2. the intake valves heat less during engine operation3. the valve spring pr
10、ovides the force necessary to close the valve4. the valve train should undergo regular maintenance5. the more power strokes produced for each revolutionEXERCISE 61. engine operation 2. valve rotator 3. grooves 4. freely 5. which6. is compressed 7. causes 8. against 9. roll down 10. the valveEXERCISE
11、 71. C 2. F 3. A 4. I 5. B 6. D 7. J 8. E 9. G 10. HEXERCISE 81. 顶置双凸轮轴 2. 顶置单凸轮轴 3. 顶置气门 4. 电子控制装置 5. 三菱新气门相位和升程电子控制装置 6. 智能可变气门相位 7. 智能可变气门相位和升程电子控制装置 8. 可变气门升程EXERCISE 91. 1）out of alignment 2）tires2. 1）low 2） the transmissionUnit 4EXERCISE 11. T 2. F 3. T 4. T 5. F 6. FEXERCISE 21. 一次电路 2. ignit
12、ion system 3. 磁力场 4. spark plug wire 5. 曲轴正时传感器 6. distributor cap 7. 点火线圈一次绕组 8. control module 9. 分电器触点 10. breaker pointEXERCISE 31. spark plug 2. ignition system 3. ignition coil 4. ignition switch 5. An electronic ignition system 6. the secondary windings 7. battery 8. primary windingsEXERCISE 41. D 2. A 3. F 4. B 5. C 6. EEXERCISE 51. changes electron flow into light and the horn into sound2. every vehicle has its own ignition system and is started by it3. consists of these parts like spark plugs, wiring, distributor, ignition coil, and source of electrical current4. it would s
