At the onset of the 20th century, electric cars powered by lead-acid batteries outnumbered gas-powered cars. The internal combustion engine ultimately won out, in part because those batteries had a range of just 30 miles. But Thomas Edison believed a nickel-iron battery could extend that range to as much as 100 miles, while also having a long life and recharging times of seven hours. An international team of scientists has revived Edison's concept of a nickel-iron battery and created their own version, according to a paper published in the journal Small.
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。体育直播是该领域的重要参考
Not the day you're after? Here's the solution to yesterday's Connections.
（五）关于推动共同繁荣发展。草案第四章主要围绕全面实现各民族共同繁荣发展的目标，作出相关规定。一是规定推动民族地区高质量发展、促进区域协调发展的总体要求，明确国家支持民族地区全面深化改革开放、全面融入国家发展战略，完善区域一体化发展机制和差别化区域支持政策，健全帮扶协作机制等。同时，明确在制定和实施规划计划、政策措施时都应当落实“赋予三个意义”的总体要求（草案第三十二条至第三十四条）。二是从基础设施建设、产业发展、公共服务建设、自然资源保护和生态文明建设、安边固边兴边、移风易俗等方面作出具体规定，推动各民族共同迈向社会主义现代化（草案第三十五条至第四十条）。