诊断系统性红斑狼疮阳性率最高的是()
A．抗双链DNA抗体阳性
B．γ球蛋白减少
C．抗核抗体阳性
D．抗变性的IgG抗体阳性
E．血小板减少
参考答案：C
成年女性耻骨弓的角度平均是：
A．60°～80°
B．70°～80°
C．80°～90°
D．90°～100°
E．100°～110°
In the short run, price searchers maximize profits by producing output where marginal revenue (MR):（）
A. equals marginal costs (MC) and charging a price based on the average total cost (ATC) curve.
B. is greater than marginal costs (MC) and charging a price based on the demand curve.
C. equals marginal costs (MC) and charging a price based on the demand curve.
