如图所示,为A,B,C三个物体从同一地点,同时出发沿同一方向做直线运动的x﹣t图象,则在0﹣t0时间内,下列说法正确的是( )
Mrs. Green didn't talk to her husband for a long time, but now they ____ each other.
在反应2Mg+CO22MgO+C中,氧化剂是 ( )