我市某一周每天的最高气温统计如下:27,28,29,29,30,29,28(单位:℃),则这组数据的极差与众数分别为( )
A:2,28
B:3,29
C:2,27
D:3,28
- Any special in this shopping mall now?
- Sure, we have the latest e-products on sale.
如图①→④主要表示了变形虫细胞的分裂过程示意图,下列有关该过程说法错误的是( )
Roy thinks he works as as his friend, Dan.