When ________ with the United States, China has too much population.
A:compared
B:comparing
C:to compare
D:having compared
若反比例函数y=2x的图象上有两点P1(2,y1)和P2(3,y2),那么( )
若(2x﹣4)2+(x+y)2+|4z﹣y|=0,则x+y+z等于( )