7 8
6 5
2 2
写出下列命题的逆命题、否命题、逆否命题,并指出他们的真假:(1)若xy=0,则x,y中至少有一个是0;(2)若x>0,y>0,则xy>0;
Before I watched ____ 3-D film Life of Pi, I had never seen ______ wonderful film like this.