单词:quaternary ammonium halide
[化] 季铵卤化物
单词:quaternary ammonium halide 相关文章
In business, Optus has called for Telstra's proposals on its participation in the national broadband network to be blocked. Optus' chief executive Paul O'Sullivan says Telstra's current plan for the separation of its retail and wholesale arms wholesa
发表于:2018-12-11 / 阅读(112) / 评论(0)
澳洲ABC新闻快递2011年
Because the British were the most active in the early years, British names are predominant in the geological lexicon. Devonian is of course from the English county of Devon. Cambrian comes from the Roman name for Wales, while Ordovician and Silurian
发表于:2019-01-29 / 阅读(98) / 评论(0)
万物简史
AGRICULTURE REPORT – March 12, 2002: Carbon Dioxide and Crops By George Grow This is the VOA Special English AGRICULTURE REPORT. Increasing levels of carbon dioxide gas in Earth’s atmosphere have
发表于:2019-01-30 / 阅读(131) / 评论(0)
农业与发展