下列关于物体惯性的说法中正确的是 A.在任何情况下都有惯性   

下列关于物体惯性的说法中正确的是

A.在任何情况下都有惯性        B.只有受外力作用时才有惯性

C.运动速度越大时惯性越大        D.只有在静止或做匀速直线运动时才有惯性

答案

A

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