Tham khảo tài liệu 'how to prepare for the toefl part 54', ngoại ngữ, toefl - ielts - toeic phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 534 EXPLANATORY ANSWERS AND AUDIO SCRIPTS The combination of a reinforced structure and flexible materials has been proven to reduce earthquake damage. But even these engineering techniques are insufficient if the building has been constructed on filled ground. Soil used in fill dirt can lose its bearing strength when subjected to the shock waves of an earthquake and the buildings constructed on it can literally disappear into the Earth. In areas where earthquakes are known to occur understanding the terrain and using the techniques we have discussed today can greatly reduce property damage and can save lives as well. Now get ready to answer the questions Audio 42. What is the topic of this lecture Answer C . . . we have developed several techniques for building more earthquake-resistant structures. Choices A B and D are all mentioned in the lecture but they are secondary ideas used to develop the main topic of the lecture. Audio 43. Which technique is used to reinforce walls Answer A Walls can also be reinforced using . . . cross-bracing. Choice B refers to a structure in the center of a building. Choice D refers to a device positioned below the building. Choice C is not mentioned and may not be concluded from information in the lecture. Audio 44. Which two materials are used in base isolators Answer A B Most. base isolators . are made of. layers of steel and synthetic rubber Choice C refers to construction material but not to material used in base isolators. Choice D refers to fill dirt. Audio 45. What happens to fill dirt during an earthquake Answer C . . . fill dirt can lose its bearing strength . . . and the buildings constructed on it can . disappear into the Earth. Choice A refers to the characteristics of a moat not to those of fill dirt. Choice B refers to the techniques for building earthquake-resistant structures. The phrase shock waves in Choice D refers to the advantage of rubber not to a characteristic of fill dirt. MODEL TEST 2 COMPUTER-ASSISTED .
