Smart Cars：“智能汽车”是本单元的主题，下面是小编分享的课后答案，欢迎阅读!

　　Unit 2

　　Text A

　　Language Sense Enhancement

　　1. care 2. impact 3. orbiting satellites 4. warn of 5. location 6. at any given time 7. vibrate 8. detected 9. calculate

　　10. converted

　　Language Focus

　　Vocabulary

　　I.

　　4. 1) expansion 2) automated 3) vapor 4)take control of 5) hazards 6) satellite 7) vibrated 8) magnetic 9) bunched

　　10) in the air 11) got/was stuck in 12) approximately

　　5. 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

　　6. 1) incorporates all the latest safety features

　　2) two trees ten 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 groups

　　4. 1) the application/ has turned into a reality/ are poised to

　　2) that vibrate/can detect/frequency

　　3) lanes/are mounted in/alert a /hazard

　　II. Word Formation

　　Clipped Words: kilogram/memorandum/gymnasium/liberation/doctor/veterinarian/preparatory/ automobile/influenza

　　Blends: medical care/electronic mail/communications satellite/news broadcast/sky hijack/ European dollar/breakfast and lunch/television broadcast/Oxford and Cambridge

　　III. Usage

　　1) swimming pool 2) drawing board 3) enriched Middle English 4) disturbing change 5) fully developed prototype 6) canned food 7) working population 8) puzzling differences

　　Comprehensive Exercises

　　I.

　　3. 1) computerized 2) start up 3) be poised to 4) alert 5) hazards 6) monotonous 7) take control of 8) steer 9) lane 10)

　　decrease 11) calculate 12) getting stuck in 14) mounted 15) detect 16) vapor

　　4. 1) generates 2) related 3)revolutionized 4) enable 5) opportunities 6) overall 7) manufacturing 8) dependent

　　9) interact 10) fatalities