A:1
B:1.5
C:2
D:3
月用水量(吨)
3
4
5
8
户 数
2
1
则关于这若干户家庭的月用水量,下列说法错误的是( )
—That's a great sweater.I have never seen anything like it before.
—You think so? My grandmother ________ it for me. ( )
关于x的方程2a-3x=6的解是非负数,那么a满足的条件是 ( )
Who book is this?____