— Alice, could you help me ________ the meat? I want to make some dumplings for dinner.
— OK. I'll do it right away.
A:put up
B:give up
C:use up
D:cut up
如图所示,四边形OABC为正方形,边长为6,点A、C分别在x轴,y轴的正半轴上,点D在OA上,且D点的坐标为(2,0),P是OB上的一个动点,试求PD+PA和的最小值是____
若单项式-13πny2n-1的次数是3,求当y=3时此单项式的值