摩擦成本法（Frictioncostapproach）
摩擦成本法（Friction cost approach）
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下列选项中，关于夹具属性描述错误的是：A．friction设置形状的摩擦系数，介于0~1。B．restitution设置形状的复原性（也就是弹性），取值0~1。C．density 设置形状的密度，以kg/m2为单位。D．body设置与夹具关联的对象。