A.5 B.10 C.15 D.20
A.高電壓大電流 B.低電壓大電流 C.高電壓小電流 D.低電壓小電流
A.1 B.2 C.3 D.4
A.3 B.5 C.8 D.10
A.14 B.15 C.16 D.17