— Is your father free these days?
—No. He has mountains of work to do. He gets up early and comes back late every day.
A:lots of
B:some
C:a little
3千克450克=____千克
3小时18分=____分
0.25时=____分
3.45平方米=____平方分米=____平方厘米.
下图表示动物肌肉细胞细胞膜转运部分物质示意图,与图中信息不相符的是( )