工艺基准是在 （） 过程中所采用的基准。
参考答案：工艺
在下列传输介质中，哪一种错误率量低
A．同轴电缆
B．光缆
C．微波
D．双绞线
A vessel, other than a rescue unit, designated to co-ordinate surface search and rescue operation within a specified area is known as（）.
A.salving vessel
B.co-ordinator surface search
C.mersar
D.the vessel being salved
