正常运行时，汽轮机推力轴承中充满了
A．蒸汽
B．润滑油
C．抗燃油
D．冷却水
参考答案：B
当上一级SPD与次级SPD都采用限压型SPD时，两者之间的电缆线隔距应大于（）m。
A.1
B.2
C.5
D.10
In terms of Maltese civil law, explain the principal rights and obligations of the mandator and mandatary vis-à-vis each other. (10 marks)
