Objective To discuss the distribution statue and clinical statue of different hepatitis B virus genotypes in our area.
目的探讨本地区乙肝病毒基因型的分布状况及其与临床病情的相关性。
Explain and evaluate J. B. Clark's marginal productivity theory of distribution.
解释和评价克拉克的边际生产力分配理论。
Pine wilt disease, Bursaphelenchus xylophilus is a serious disease of pines in Zhoushan city Zhejiang province. It was dealt with occurrence. distribution and control of B. xylophilus.
松材线虫病是松树的一种毁灭性病害。本文就松村线虫病在舟山地区的发生、分布及除治等进行了论述。
应用推荐