How to exert the geographical advantage of Heilongjiang province to resolve the unfavorable factors of turns into be the important subject of cultivation and promotion of sweet sorghum crops.

 
  • 如何发挥黑龙江省的地域优势,排除制约甜高粱产业发展的不利因素,成为种植和推广甜高粱作物的重要课题。
今日热词
目录 附录 查词历史