题目内容

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

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