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