如果胃的结构发生了病变,会影响哪种食物成分的消化?( )
已知D(x0,y0)为圆O:x2+y2=12上一点,E(x0,0),动点P满足 OP→ = 12ED→ + 33OE→ ,设动点P的轨迹为曲线C.
— Help____ (you) to some fruit, Millie and Sandy.
— Thank you very much.