A:①>②
B:①<②
C:①=②
D:不能确定
物体做匀加速直线运动,其加速度的大小为5 m/s2,那么,在任意1秒内( )
In his victory speech,______ before a huge crowd of his supporters,Obama declared that “change has come to America”.
填上合适的介词。
Look ____ the picture.