Traveling all over America, Bell demonstrated his invention to the public at countless exhibitions and by 1877 the first telephone was in commercial use.. Bell was born in the USA.[r]
Đang tải... (xem toàn văn)
THÔNG TIN TÀI LIỆU
Thông tin cơ bản
| Định dạng | |
|---|---|
| Số trang | 2 |
| Dung lượng | 17,47 KB |
Nội dung
Traveling all over America, Bell demonstrated his invention to the public at countless exhibitions and by 1877 the first telephone was in commercial use.. Bell was born in the USA.[r]
Ngày đăng: 02/11/2021, 16:10
TÀI LIỆU CÙNG NGƯỜI DÙNG
TÀI LIỆU LIÊN QUAN