学进去-教育应平等而普惠
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类型:概要写作
难度系数:0.15
所属科目:高中英语

What started as a race to space between the United States and Russia has turned out to be a technological revolution that has greatly improved the quality of daily life throughout the world. Scientists at the National Aeronautics and Space Administration (NASA) have invented new technology to make space flights doable. The same technology, when applied on Earth, has produced thousands of products in the areas of health and sports that have significant impacts on our lives.

Many of these improvements are in the fields of health and medicine. NASA-inspired technology fueled the great advances in the early detection of deadly diseases. For instance, computer chips designed for the Hubble telescope are used in digital imaging devices that help medical professionals detect cancer at very early stages. Eye doctors can now diagnose vision problems in very young children by using ocular screening. Ultrasound scanners, portable x-ray devices, and bone analyzers are among the medical devices developed with the help of space technology.

Fogless ski goggles and special sportswear are among the hundreds of items of sports equipment inspired by NASA technology. Space technology has been applied to sports too. The running shoes that athletes use today have midsoles that act like shock absorbers and keep the runners steady while in motion. These shoes utilize the technology NASA used to design the moon boot. In golf, athletes use a new ball that employs NASA research on how to make the flight of the ball from the tee to the green faster and more accurate. In swimming, athletes can swim faster because of NASA-developed riblets in the fabric of their swimsuits.

Almost all aspects of daily life continue to improve because NASA scientists are still at work. Transportation, methods of preparing food, and work environments are other ways in which NASA technology has made significant changes.


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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

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2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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