浙江省政策性农业保险试点阶段的参保对象是() ["A、种养大户","B、中小散户","C、所有种养户","D、困难户"]
微生物的分离方法中不包括() ["A、稀释平板法","B、影印法","C、划线法","D、单细胞挑取法"]
浙江省政策性农业保险的特点是() ["A、实行高保费高保障","B、实行低保费高保障","C、实行高保费低保障","D、实行低保费低保障"]
牛津单位的青霉素G等于()个重量单位 ["A、1688","B、1268","C、2668","D、1667"]
国内水路货物运输保险的基本险责任包含:() ["A、自然灾害","B、意外事故","C、雨淋","D、破碎、渗漏"]
简述“亚社区”的基本特征。