一物体由静止开始沿直线运动,其加速度随时间变化规律如图所示,取开始运动方向为正方向,则物体运动的v﹣t图像,正确的是( )
A:
B:
C:
D:
A.Where did you go over the winter holiday?
B.How tall are you?
C.Did you see a film last night?
D.You didn't come to school. What happened?
E.Are you all right?
⑴____ ⑵____ ⑶____ ⑷____ ⑸____