多发伤感染应用抗生素的原则是_______、_______、_______。
参考答案：早期；足量；短期
骨骼肌收缩（）
A．β2受体激动
B．α1受体激动
C．M受体激动
D．N2受体激动
E．DA受体激动
国家如何运用财政政策和货币政策调控经济平稳运行？
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