单词：rubidium chlorate
氯酸铷
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The little splints of wood which we call matches are made out of deal or pine wood which has been soaked in melted paraffin wax to make it burn more easily. 这种被我们称之为火柴的薄木片由欧洲赤松（松树）制成, 在液体的石蜡
发表于:2018-12-18 / 阅读(60) / 评论(0)
英国学生科学读本
英国学生科学读本
China has launched two satellites into space on a Long March carrier rocket from the Xichang Satellite Launch Center in Sichuan Province. The satellites are part of the country's growing BeiDou Navigation Satellite System. The launch of the Long Marc
发表于:2019-01-19 / 阅读(116) / 评论(0)
2018CRI中国国际广播电台
2018CRI中国国际广播电台