Today it's normal for married women to go out to work, but it was _____________ in the past.
A:common
B:more common
C:less common
D:the most common
(2015•日照)小红在观察由一些相同小立方块搭成的几何体时,发现它的主视图、俯视图、左视图均为如图,则构成该几何体的小立方块的个数有( )
若|3a+b+5|+|2a﹣2b﹣2|=0,则2a2﹣3ab的值是 ____.