Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.
亚群禽白血病病
(ALV-J)
种主要感染肉用型鸡
反转录病。
小组织
群人;
;
, 同类;;Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.
亚群禽白血病病(ALV-J)种主要感染肉用型鸡反转录病。
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影响,得到幂零群若干等价条件和个充分条件。
Let G be an infinite group. If G has a normal elementary abelian subgroup, then G is irrecognizable.
设G无限群,若G存在正规初等交换子群,则G不可分辨.
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