—There are some apple pies on the table, you may take ______.
A:it
B:this
C:that
D:one
—I don't know the _______. Maybe you can ask his good friend Simon.
三角形的三边长a,b,c满足2ab=(a+b)2﹣c2,则此三角形是( )
下边漫画《父母陪读》的寓意是( )