A transistor amplifier has an input signal applied to its emitter terminal and an output signal taken from its collector terminal.The amplifier is a（n）（）.

A transistor amplifier has an input signal applied to its emitter terminal and an output signal taken from its collector terminal.The amplifier is a（n）（）.
A.common-emitter amplifier
B.common-base amplifier
C.common-collector amplifier
D.emitter follower
正确答案：common-base amplifier