Employees who have worked here for many years will be given ______ over newcomers.

A． preference

B． prejudice

C． promise

D． experience

如图所示是某同学在测电路中的电压，据右图电压表的读数，试分别指出在这个电路中，总电压是     ，L₁两端的电压是     ,L₂两端的电压是      。