thetelephonePPT,thetelephone

大学英语精读_第四册_unit_10_the_telephone概要1.ppt
z x xk bell invented the first telephone in 1876.
需要关于电话什么的ppt可以看看哦. the history of the telephone
the bad of mobilephoneppt
who was the telephone invented by? it was invented by bell.