A:lna>lnb
B:0.3a>0.3b
C:a12>b12
D:a3>b3
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物体甲的速度与时间图象和物体乙的位移与时间图象分别如图所示,则这两个物体的运动情况是( )
We want to know he will come back, as we are worried about his safety.