原题
录音 1
Why does the speaker mention a light bulb?
ATo indicate a household item that responds to remote controls
BTo explain the light source of the Flash-Matic's cells
CTo point out an older technology that improved in the 1950s
DTo help illustrate a disadvantage of the Flash-Matic
正确答案：D
解题思路
老师暂未填写解题思路。