a premise that allow of only one conclusion假设容许只有一个结论I disagree with the premise that economic development has priority over the environment.我不赞成经济发展应优先于环境保护这个前提。Electrification of the countryside is the premise of agric...
Callus was induced from explants of cassava stem with bud and shootlet.用木薯茎切段及顶芽作为外植体,诱导木薯愈伤组织的形成.The results shew that hypocotyl's velocity, quality and differentiation were better than other explants.结果表明:外植体为胚轴出愈...