A:①
B:①②
C:①②③
D:①②③④
如图所示,两个质量相等的物体A、B从同一高度沿倾角不同的两光滑斜面由静止自由滑下,在物体下滑到斜面底端的过程中,下列说法中正确的是( )
An advertisement uses words and pictures to ____ people to buy a product or service, or to believe in an idea.