12个班的学生去春游,平均每班有45人.一共有9辆大客车.平均每辆大客车要坐多少人?
12×45÷9,
=540÷9,
=60(人);
答:平均每辆大客车要坐60人.
下列物质,不是由原子直接构成的是( )
A.铁
B.汞
C.氖气
D.水
--- did you go on vacation?
---I went to summer camp.
A.When
B.Where
C.How
D.Why