题目内容

关于“平衡”、“平衡力系”、“平衡条件”，错误的说法是（）

A. 平衡有两种状态，分别是静止状态和匀速直线运动状态
B. 刚体处于平衡状态时作用于其上的力系称为平衡力系
C. 平衡力系应满足的条件称为平衡条件
D. 做匀加速直线运动的汽车上相对汽车静止的物体处于平衡状态

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1. It is required by British law that students should receive 12 years of compulsory education.

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