内生放线菌ts-6对灰葡萄孢菌的拮抗作用及其防病效果
1·During the transformation period, there is a labor market form of dualistic structure, i. e. rivalrousness and monopoly coexist in market system, cities and towns, industries, market endogeny.
在我国经济转型期存在着体制型、城乡型、行业型以及市场内生型等竞争性与垄断性并存的二元结构劳动力市场形式。