粉煤灰硅酸盐水泥代号是（） ["P`S`A","P`O","P`F","P`C"]
将P0口的3号位清0的指令是：（） ["SetB P0.3","CLR P0.3","CPL P0.3","Mov P0，#0"]
合剂、酒剂的用法是（）。 ["直接吞服法","开水送服法","药汁送服法","沸水送服法"]
材料其电阻随温度升高面降低（） ["康铜","镍铬合金","碳","锰铜"]
将P0口的6号位置1的指令是：（） ["SetB P0.6","CLR P0.6","CPL P0.6","Mov P0，#0"]
简述动环系统中遥信的定义。
