C The United States' aviation industry(航空业) was rising in the 1920s. During that time, people in Americ a still regarded flying a plane as an extreme sport(极限运动), so very few would choose to travel by air. But a young woman named Edn a Gardner Whyte thought differently. She be...
Airplanes and automobiles widened the geographic boundaries of people's lives. In December 1903, Orville and Wilbur Wright successfully flew the first powered heavier-than-air vehicle. In 1908 Henry Ford introduced his Model-T, a mass-produced automobile available at the affordable price of $ 850...
The United States aviation industry(航空业) was rising in the 1920s. During that time, people in America still regarded flying a plane as an extreme sport(极限运动), so very few would choose to travel by air. But a young woman named Edn a Gardner Whyte thought differently. She believed ...
These operations by light airplanes were small compared with those of World War II, but they did demonstrate the efficacy of the strategic air offensive. Prophets of the offensive use of air power included Marshal of the Royal Air Force Lord H.M. Trenchard; Winston Churchill, British minister ...