Last year, America's Defence Advanced Research Projects Agency, DARPA, thought it would be a good idea to organize a robot race across the Nevada desert. The idea of the Grand Challenge, as DARPA dubbed it, was for autonomous robot vehicles to steer a 227 km(142 mile) course and claim a $1 m jackpot. This would be a first step towards DARPA's ultimate goal of being able to build unmanned self-driving military vehicles and thus keep American troops out of harm's way on the battlefield.
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There have been()medicine in the last 50 years.
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按要求改写句子:They worked here last year. ( 改为否定句)
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My grandmother's hair began to ~ last year.
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Bosses now prefer to be paid in share options. The average chief executive of one of America's top 200 firms would take home just over $750,000 in gold. In fact, in 1998 he made a pre-tax profit of $8.3 m by exercising executive share options, which give the right to buy a fixed number of his company's shares at a fixed price in what is now a rising market. At the end of last year, he also had total unrealized profits on stock options of nearly $50m.
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They have produced ____ grain this year ____, they did last year.
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Where did Michael go last year? 查看材料
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Did you go to Beijing last year? No,().
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Carol ____in the Sierra Madre Mountains last year.
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Blonnick Corp. has found that its weighted average collection period has increased from 50 days last year to 55 days this year, and its average days of receivables this year is 48 compared to 52 last
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