单词：hafnium bromide
溴化铪(IV) {四溴化铪}
单词：hafnium bromide 相关文章
AGRICULTURE REPORT - Restrictions on Methyl Bromide By Mario Ritter Broadcast: Tuesday, March 16, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Graphic Image Some chemicals
发表于:2019-01-06 / 阅读(230) / 评论(0)
农业与发展
农业与发展
By Caty Weaver Broadcast: September 12, 2003 This is Bob Doughty with the VOA Special English Environment Report. Scientists in the United States have reported some good news about the 1)ozone in the
发表于:2019-01-11 / 阅读(207) / 评论(0)
VOA2003（下）-环境与健康
VOA2003（下）-环境与健康
AGRICULTURE REPORT - Cover Crops By Mario Ritter Broadcast: Tuesday, March 23, 2004 This is Steve Ember with the VOA Special English Agriculture Report. The idea to grow a crop that improves the land
发表于:2019-01-30 / 阅读(197) / 评论(0)
农业与发展
农业与发展