A:How many bags?
B:How many books?
一个正方体棱长总和是48厘米,它的棱长是____厘米。
在如图所示的3×3正方形网格中,矩形(不包括正方形)的个数是( )
——Does your aunt only have a piece of bread for supper? ——Yes. She eats a little . She looks slimmer than before.