控释肥CAU3144F、COMPO对雏菊、矮牵牛 、 三色堇的应用效果显著.CRF of CAU 3144 F was the most optimal for petunia, COMPO for pansy and daisy respectively.三色堇是我国冬春常用的草本花卉,在我国广泛栽培.Pansy Viola wittrockiana is an important ornamental plant used in t...
请你邮寄这个小包裹算是利用你 吗 ?Would it be an imposition to ask you to mail this parcel?请你替我把这个小包裹捆一下好 吗 ?Will you do up this parcel for me?几个青年妇女把掉在水里又捞出来的小包裹,丢给了他们.The women rescued their bundles which had fallen into the water and...
In this paper, a discrete stage - structured epidemical model is proposed and studied.本文主要讨论了离散的阶段结构传染病模型.OBJECTIVE To explore the administration measures of air condition usage in SARS epidemical period.目的研究传染性非典型肺炎流行期间...