某厂1月份产量为a吨,以后每个月比上一个月增产x%,则该厂3月份的产量(单位:吨)为( )
A:a(1+x)2
B:a(1+x%)2
C:a+a•x%
D:a+a•(x%)2
如图所示,已知OA⊥OB,OC⊥OD,则图中∠1和∠2的关系是( )
Mike used to be a top student, but he______ behind since he lost himself in computer games.