如图所示两质点作同方向、同频率的简谐振动,它们的振幅相等。当一质点在x=A/2处向左运动时,另一质点在x=-A/2处向右运动,两质点的位相差( ) <img src="https://static.zxtiku.com/wangke/imgs/topic/85ccaace6045bdc107d830c360afdf29.jpg"/> A. <br/> 0 B. <p style="display:inline">2 <img src="https://static.zxtiku.com/wangke/imgs/topic/9b98c9db49fb60e81db7a14895ff0ee4.jpg"/> C. <br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/9b98c9db49fb60e81db7a14895ff0ee4.jpg"/> D. <p style="display:inline">3 <img src="https://static.zxtiku.com/wangke/imgs/topic/9b98c9db49fb60e81db7a14895ff0ee4.jpg"/>