题目
汽车以大小为20m / s的速度做匀速直线运动,刹车后,获得的加速度的大小为5m /s2,那么刹车后2s内与刹车后6s内汽车通过的路程之比为( ) A.3 : 4 B.3 : 5 C.4 : 3 D.2: 3 答案:AWalking and running are the oldest and
newest, excellent _________ exercise for all ages and fitness levels.
A.bodies shaping
B.body shaping
C.bodies shaped
D.body's shape