(非英语专业学生做)(Para. 2, Passage 2)The advancement of technology depends upon research and development, and the latest statistics sho

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问题 (非英语专业学生做)(Para. 2, Passage 2)The advancement of technology depends upon research and development, and the latest statistics show that the United States is continuing to pump billions of dollars annually into such efforts. So while we are running out of s

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答案技术的进步在于研发。最新的统计资料表明,美国每年在研发领域投入的资金高达数百亿美元。虽然我们的某些稀缺资源正日益短缺,但通过研究项目,我们可从技术上获得许多替代品。

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