A ( ) is a device that passes electric signals at certain frequencies.
A. converter
B. actuator
C. switch
D. filter
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Transistor may be roughly grouped into two major divisions: ________ and field-effect.
A. single
B. polar
C. bipolar
D. wire
A SRAM is an array of addressable( ) .
A. DRAM
B. Flip-flop
C. ROM
D. EEPROM
The electric current flows from ______ to ______.( )
A. negative, positive
B. positive, negative
C. minus, plus
D. A and C
The most commonly used semiconductor is silicon.
A. 对
B. 错