共用题干 On May 1,2006,New York's Empire State Building celebrated its 75th birthday.When it was built in 1931 it was over 61 m taller than its nearest rival,the Chrysler Building,and at 381m remained the tallest in the world for 41 years,until the World Trade Center was completed in 1972- 1973.The story of the Empire State Building begins with two men's race to build the highest man-made structure in the world.In 1889 the central feature of the World's Fair in Pairs was Gustav Eiffel's massive tower,constructed with wrought iron,and standing 300m high.Architects in the United States viewed this as something of a challenge,and by the early 20th century the race was on to erect taller buildings than ever before.Soon skyscrapers were springing up along the New York sky-line.In 1928 the founder of the Chrysler Corporation,Walter Chrysler,announced the building of a huge new skyscraper,taller than anything so far constructed in New York.It soon became clear that the new building was part of Chrysler's aim to challenge the motoring giant General Motors.So John Jakob Raskob,of General Motors,decided to race Chrysler to the top.The final height of Chrysler's building was kept secret until it was completed,so Raskob instructed his architects to construct the highest tower they could.Their architectural plans had to be modified as the Chrysler Building grew ever higher,but when it topped 77 stories the Empire State Building team knew that they could beat it.No building project has yet exceeded the Empire State Building's record for speed of construclion.From the beginning of construction in March 1930 it took 410 days and approximately 7 million man-hours to build.It rose at an astonishing speed of 4.5 stories per week,thanks to careful planning and quality of work.The building was officially opened on May 1,1931,by President Hoover. The Chrysler Building was 320m high.
A.Right B.Wrong C.Not mentioned正确答案A
