Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.
亚
禽白血病病毒(ALV-J)是
种主要感染肉用型鸡的反转录病毒。
；隶属的小组织
组，组;
;Avian leukosis virus subgroup J (ALV-J) is a retrovirus which infects meat-type chickens.
亚禽白血病病毒(ALV-J)是种主要感染肉用型鸡的反转录病毒。
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.
正规子对有限结构的影响,得到幂零的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是无限,若G存在正规初等交换子,则G是不可分辨的.
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