【单选题】下列哪种凝血因子的合成不需维生素 K 参与
【单选题】对于同一波列,十分之一高和有效波高的关系( )
【判断题】保护层的功能是使混凝土结构中的钢筋免于大气的锈蚀作用。
【单选题】If the price level rises above what was expected and nominal wages are fixed, then
A.
production becomes less profitable so firms will hire fewer workers.
B.
production becomes less profitable so firms will hire more workers.
C.
production becomes more profitable so firms will hire fewer workers.
D.
production become more profitable so firms will hire more workers.
【判断题】84保护层的功能是使混凝土结构中的钢筋免于大气的锈蚀作用。