How was the Notre-Dame Cathedral built? Why is the Great Mosque of Cordoba important? How did flying buttresses change cathedrals? Why are the minarets of the Taj Mahal leaning outward? How did the use of pointed arches change cathedrals? How was the Colosseum decorated? How was St Paul's...
While concrete easily resists compression, it does not tolerate tension well, and this weakness meant that it could not be used to build structures—like bridges or buildings with arches—that would be subject to bending action. French and English engineers first rectified this deficiency during ...
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The ancient Romans developed superior techniques for building with masonry, but, curiously, they did not often use their masonry skills in dam construction. An exception was the Proserpina Dam in Merida, Spain, that is still standing today. Developments by the Romans were not overlooked by others...
Questions 5 to 8 are based on the conversation you have just heard. 5. What do we learn about the woman?6. What does the woman say about the clothes she made at first?7. Why did the woman persevere in making clothes for herself?8. What does the woman plan to do in the future?