The Petronas Twin Towers in Kuala Lumpur in Malaysia were completed in 1998. Each tower is 452 meters high and has 88 floors. De

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问题     The Petronas Twin Towers in Kuala Lumpur in Malaysia were completed in 1998. Each tower is 452 meters high and has 88 floors. Designed to serve all floors, the four executive lifts(公务电梯) in each tower transport passengers from the underground car park to the top floor in 90 seconds. The towers are joined 170 meters up by a two-level bridge on the 41st and 42nd floors.
The Sears Tower in Chicago in the United States was the tallest building in the world for more than 20 years. Completed in 1973, the tower is 442 meters high. It has 110 floors and 14,771 square meters of space. Its non -stop lift goes up to the top floor at a speed of 487 meters per minute.
    At 421 meters high. Jin Mao Tower in Shanghai is the tallest building in China. Completed in 1999, it has 88 floors and has the world’s highest hotel rooms. This building was made to be strong-it can stand typhoon (台风) winds of up to 200 kilometers per hour.
Burj Dubai is a modern building presently under construction in Dubai in the United Arab Emirates. Because of the strong desire to build the world’s tallest building, much information about Burj Dubai is kept secret. However, experts expect the tower to have 162 floors and go up to 808 meters high. Its lifts will be the fastest in the world, traveling at 18 meters per second. It is due to be completed in 2008 or 2009.  
One can get to the top floor of the Sears Tower by its non-stop lift in _____.

选项 A、30 seconds
B、about 1 minute
C、nearly 2 minutes
D、a minute and a half

答案B

解析
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