通道保护与()开销无关。
参考答案:复用段
Under the cost recovery method, profit is recognized:()
A. as collection occurs.
B. after the amount of cost has been collected.
C. at time of delivery.
拍电报时的嘀表示短声,嗒表示长声;一组嘀嗒嘀嘀所表示的二进制编码可能是()。
A、1001
B、1010
C、1011
D、1100