ThefirsttelegraphcablewaslaidundertheseabetweenEnglanda...
問題詳情:ThefirsttelegraphcablewaslaidundertheseabetweenEnglandandFranceinesaremuch 1andheavierthantelegrapheareanumberofreasonsforthis:onereasonisthatthesaltwateroftheseaharms 2 telegraphwires,ands...