题目

A lot of people are here vacation every year. A . in B . at C . on D . with 答案：C有关真核细胞分裂的叙述，正确的是A.无丝分裂过程核膜不消失B.动物细胞仅以有丝分裂方式进行增殖C.洋葱根尖分生区细胞中心体发出星射线D.减数分裂具有周期性