The current through the power supply is _____.
A、a few thousandths of an ampere
B、a few thousandths of the ampere
C、a few thousandths of ampere
D、a few thousands of an ampere
A、a few thousandths of an ampere
B、a few thousandths of the ampere
C、a few thousandths of ampere
D、a few thousands of an ampere