ThefirsttelegraphcablewaslaidundertheseabetweenEnglanda...
问题详情:ThefirsttelegraphcablewaslaidundertheseabetweenEnglandandFranceinesaremuch 1andheavierthantelegrapheareanumberofreasonsforthis:onereasonisthatthesaltwateroftheseaharms 2 telegraphwires,ands...