填空题
Computers can do 500,000 sums in one minute, faster and better than we can.
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N
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Charles Babbage was tile person who invented the first calculating machine.
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1.奥运是当今世界上最令人振奋的事件之一。 2.奥运也给举办国的经济发展带来了机遇。 3.我国(北京)应该如何为奥运做准备。
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