Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.
亚群禽白血
(ALV-J)是一种主要感染肉用型鸡的反转
。
织
;，;
，类;化枝;Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.
亚群禽白血(ALV-J)是一种主要感染肉用型鸡的反转。
Considering the subnormal subgroups,some equivalent conditions for nilpotency of finite groups are given and a sufficient condition for nilpotency of finite groups is obtained.
研究次正规子群对有限群结构的影响,得到幂零群的若干等价条件和一个充
条件。
Let G be an infinite group. If G has a normal elementary abelian subgroup, then G is irrecognizable.
设G是无限群,若G存在正规初等交换子群,则G是不可辨的.
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