大多数禾本科胚有一片瓣 状 结构通常称为外胚叶.Most grass embryos have a flap - like structure known as the epiblast.目的: 研究少汗性外胚叶发育不全引起先天缺牙的ED1基因突变.Objective : To detect ED 1 gene mutation in three hypohidrotic ectodermal dysplasia ( HED ) nuc...
On the supply side, individuals are assumed to operate on the principle of utility maximization.从供给方面来看, 假定个人行为是遵循效用最大化原则.Does the enterprise to be able to pursue the profit maximization.搞企业的都会追求利润最大化.The enhancement ent...