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Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
Those who favored American imperial expansion in the late 19th and early 20th century believed it would provide bases for the U.S. Navy.
The similarities between the 20th and 21st centuries lie in innovations. The 20th and 21st centuries have been periods of great strides in technology and other areas.
Mohandas Gandhi - Apex (Just took the Quiz)
17
I am pretty sure that it is the early 20th century
Science and theory in the early 20th century?.
William Hoover invented the vacuum cleaner in the early 20th century.
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The Steamboat
Radio was not an important invention in the early 20th century. Instead it was developed by Heinrich Hertz in the 18th century. The cotton gin (APEX)
In the early 20th century.
Chad, Niger, Mali, and Mauritania were know as the French Sahel in the early 20th century
Chad, Niger, Mali, and Mauritania were know as the French Sahel in the early 20th century
Early 20th Century
It began in the early 20th century.
The Steamboat