Variety.相关论文
A solution is given for the word problem for free idempotent distributive semirings. Using this solution the lattice L(I......
1983~1985年,应用我国统一使用的七个稻瘟病菌生理小种鉴别品种,对我省64个县(市)的320个稻瘟病菌单孢菌株进行了鉴定.鉴定结果全省稻......