A:甲图中CD段一定发生在有丝分裂后期
B:甲图中的AB段若发生在高等哺乳动物的精巢中,细胞肯定进行减数分裂
C:乙图中AB段细胞中染色体、染色单体、DNA的比例为1︰2︰2
D:乙图中的CD段细胞中的染色体数目一定为正常体细胞的一半
(write do cook clean wash answer listen draw read work)
Everybody is very busy. Grandpa is____a letter. Grandma is____a book. Dad is ____in the study. Mom is ____dinner in the kitchen. Brother is ____ to music. Sister is____ the room. I am ____ pictures. Uncle is ____the phone. Aunt is ____ clothes. Cousin is____ homework.
电动车已成为短途交通的常用工具,下列说法不正确的是( )
今年某市约有108000名应届初中毕业生参加中考,按四舍五入保留两位有效数字,108000用科学记数法表示为( )