3个书架共有240本书,每个书架有4层,每个书架每层有多少本书?
240÷3表示( );(240÷3)÷4表示( )
每个书架放多少本书;每个书架每层有多少本书
28.The government had hoped to draw as much attention as possible to this problem but it didn't ______ that way.
A.work out
B.give out
C.go out
D.pick out
混凝土接缝标点的结构常用的有()、()、()。