His lost eyesight was       by his ever sharpening sense of hearing.

A．made of

B．made use of

C．made up of

D．made up for

泵的轴封、轴承及叶轮圆盘摩擦损失所消耗的功率称为（）。

A、容积损失；

B、水力损失；

C、机械损失；

D、摩擦损失。