Unit2-Smart-Cars练习讲解.pptVIP

1) generates 2) related 3) revolutionized 4) enabled 5) opportunities 6) overall 7)manufacturing 8) dependent 9) interact 10) fatalities Unit 2 Smart Cars Exercise 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 stuck in 12.approximately 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 1) There was an unusual quietness 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 problems. 3) The research shows that atmospheric carbon dioxide levels are closely correlated with global temperatures. 4) 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. Automobiles have, since their invention, revolutionized transportation, changing forever the way people live, 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 makes it possible to eliminate most of traffic accidents. For example, electronic 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.