a、b、c、d分别是一些生物细胞某个分裂时期的示意图,下列有关描述正确的是() A. a图表示植物细胞有丝分裂中期 B. b图表示人红细胞分裂的某个阶段 C. c图细胞分裂后将产生1个次级卵母细胞和1个极体 D. d图细胞中含有8条染色单体 答案:D Don’t worry about the child. Next to him ________ a lady, _______ he can turn when he is in trouble. A. sits; whom B. sits; to whom C. is sitting; with whom D. was sitting; to whom