A:p>1
B:p≥1
C:p<1
D:p≤1
合理膳食、合理用药是人体健康的需要.
有下列方程:①2x+x-15=10;②x-1x=2;③12x+1-3=0;④2x3+x-12=0.属于分式方程的有( )
Dream of the Red Mansions is more than novel. It can help us understand social life of that time.