我们日常生活中使用的电视机、收音机、录音机都有______,俗称喇叭.
我们日常生活中使用的电视机、收音机、录音机都有扬声器,俗称喇叭,将电信号转化为声音信号.
故答案为:扬声器.
Lisa was supposed her homework before nine o'clock. But she couldn't.
A.to finish
B.to finishing
C.finish
D.finishing