As part of the communications process，the sender is responsible for______．

A．ensuring the receiver agrees with the message

B．confirming that the information is properly understood

C．presenting the information in the most favorable manner

D．interpreting the message correctly

电冶金学是指（）。

A.凡是过程中应用电能的冶金过程

B.冶金主体设备由电能驱动的冶金过程

C.主要冶金反应所需要的能量由电能提供的冶金过程

D.从水溶液中通过电解的方式获得金属的冶金过程