已知命题p:x>0,y>0,q:xy>0,则命题p是命题q的( )条件.
A:充分不必要
B:必要不充分
C:既不充分又不必要
D:充要
——Excuse me, the shirt is a bit small for me.
——Don't worry. I'll change it for a __________ one.
下列性状不属于相对性状的是( )