Вопрос школьника по предмету Английский язык
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Cave men used to … to discuss daily activities.
Inscribing on caves can be compared to …. .
The first means of distance communication were …. .
The smoke signal is still used in the Vatican to indicate …. .
Pigeons were used for long distance communication due to …. .
Cher Ami, a homing pigeon, was awarded …. for her service during world war I
Pony express was used to deliver messages and newspapers …. .
…. were used at sea during the late 19th century.
In the 19th century … was the most popular way of long distance communication.
Radio in Latin means … .
In 1864 James Maxwell showed mathematically that …. could travel through free space.
In 1894 Marconi made an electric bell which went off …. .
In 1920 … began.
In 1876 Alexander Bell invented … .
Only … could afford the telephone at first.
PSTN is … .
Ответ учителя по предмету Английский язык
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