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1. The government is promising a review of airport security and the system for checking suspicious travelers after an alleged terrorist bent on destroying a jetliner came close to succeeding. Meanwhile, Umar Farouk Abdul Mutallab left Detroit area ho

发表于:2018-12-01 / 阅读(143) / 评论(0)

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发表于:2018-12-27 / 阅读(242) / 评论(0)

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发表于:2019-02-11 / 阅读(145) / 评论(0)

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发表于:2019-02-18 / 阅读(109) / 评论(0)

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发表于:2019-02-21 / 阅读(86) / 评论(0)

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发表于:2019-02-27 / 阅读(176) / 评论(0)

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Live a single day on planet Earth, or anywhere else in the universe for that matter, and you will experience the natural phenomenon of heat conduction, which is the term used to describe the natural flow of heat from warmer objects to cooler ones. Yo

发表于:2019-03-06 / 阅读(163) / 评论(0)

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agricultural research project