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速度与机械运动

> 站在路边的甲看见乙驾驶汽车超过了骑自行车的丙，甲说乙在前进，乙说丙在后退，丙说甲在后退，则他们各自选择的参照物 A.甲是以乙为参照物 B.乙是以丙参照物 C.丙是以甲为参照物 D.甲、乙、丙分别以自己为参照物

问题：

发布时间：2024-09-07

站在路边的甲看见乙驾驶汽车超过了骑自行车的丙，甲说乙在前进，乙说丙在后退，丙说甲在后退，则他们各自选择的参照物

A.甲是以乙为参照物
B.乙是以丙参照物
C.丙是以甲为参照物
D.甲、乙、丙分别以自己为参照物

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