直线AB和直线CD相交于O,则∠AOC的邻补角有( )
A:1个
B:2个
C:3个
D:4个
—Don't worry. I'll do what I can ______ you.
School is over. Let's go to the .
如图阴影部分扇形的圆心角是( )
补写出下列名句名篇中的空缺部分。