【摘 要】
:
The export price of vitamin B_5 in Chinahas increased constantly in 2007.Ac-cording to the analysis made byexperts,the demand of vitamin B_5 hasnot grown great
【出 处】
:
China Chemical Reporter
论文部分内容阅读
The export price of vitamin B_5 in Chinahas increased constantly in 2007.Ac-cording to the analysis made byexperts,the demand of vitamin B_5 hasnot grown greatly.The main reason forthe price rise is the change of the sup-ply mode.Such a price level can bemaintained for a certain period of time.
The export price of vitamin B_5 in Chinahas increased constantly in 2007.Ac-cording to the analysis made byexperts, the demand of vitamin B_5 hasnot grown greatly.The main reason forthe price rise is the change of the sup-ply mode.Such a price level can bemaintained for a certain period of time.
其他文献
近日,科技部火炬中心批准东营依托东营经济技术开发区建设国家火炬铜冶炼与铜材深加工特色产业基地,这是东营继石油装备、盐化工、子午胎之后,第4家国家火炬特色产业基地,东营承
在新课标理念下,如何有效提升学生的物理实验能力,夯实学生的基础知识,提高学生的核心素养,已经成为了当前教育工作者所要关注的首要课题,并受到了人们的高度重视.因此,在物
According to the statistic report of the National Bureau of Statistics of China, there are 24 159 scaled companies (allstate-owned companies, and non-state-owne
我国历史悠久,具有丰富的优秀传统文化.所以,在初中语文教学过程中,教师要摒弃传统教学观念,以学生作为教学的主体,通过传统文化来进行语文教学的渗透,能够有效地激发学生的
教师应依据学生的具体特点,制定与之相适应的教学方法,以不断提高高中语文课堂有效性.
有关谷类作物次生根的研究进行的很多,总的认为,次生根与基因型、环境因素以及耕作措施有关;次生根与谷物的农艺性状有关;干旱地区谷物产量在很大程度上依赖次生根的形成.本
鲤鱼属杂食性鱼类,生长速度较快,生活力较强,适合稻田放养,这是农村生产食用鱼的一个重要途径。但目前关于早稻田放养鲤鱼的资料报道很少。为此,根据外省经验结合我省农村水
语文课中巧用信息技术能使教学过程呈现出情景交融、形声并茂、生动活泼的美景,不仅为学生提供认知的感性材料,而且激发情趣,突出重点,突破难点,化静为动,培养了学生的美感,
1 Surplus capacityThe rapid growth of the economy in China promoted drastic development of the yellow phosphorus sector from 1985 to 2004. The capacity of yello