A.s1=s2 | B.s1<s2 | C.t1<t2 | D.t1>t2 |
1 |
2 |
1 |
2 |
1 |
2 |
A.各个物体水平方向相距200m |
B.各个物体在空中排成一条抛物线 |
C.各个物体在空中排成一条竖直线,竖直间隔相同 |
D.各个物体在空中排成一条竖直线,竖直间隔不断增大 |
A.24m | B.25m | C.36m | D.42m |
A.0 | B.100m/s | C.500 m/s | D.1000 m/s. |
A.4m/s与2m/s2 | B.0m/s与-2m/s2 |
C.-4m/s与4m/s2 | D.4m/s与-4m/s2 |
A.5:4 | B.4:5 | C.3:4 | D.4:3 |
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