There is no federal educational standard in the USA. Schooling and educational programmes are the re...: ответ на тест 29356 - Английский язык

There is no federal educational standard in the USA. Schooling and educational programmes are the responsibility of each state; this is why one can find great differences in education from state to state. No uniform demands exist on education in schools or universities throughout the nation. In most states attending school is obligatory for children between six and seventeen. Secondary education institutions include elementary schools and high schools.
Higher education in the USA is not nation-wide. Colleges differ a lot from each other in scale and level of education as well as in the “quality” of diplomas given. There are private and state universities. Private education is considered more prestigious. The most famous private university is Harvard. Higher education is rather expensive in the USA.
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Why can we find great differences in education from state to state?

There is no federal educational standard in the USA. Schooling and educational programmes are the responsibility of each state; this is why one can find great differences in education from state to state. No uniform demands exist on education in schools or universities throughout the nation. In most states attending school is obligatory for children between six and seventeen. Secondary education institutions include elementary schools and high schools.
Higher education in the USA is not nation-wide. Colleges differ a lot from each other in scale and level of education as well as in the “quality” of diplomas given. There are private and state universities. Private education is considered more prestigious. The most famous private university is Harvard. Higher education is rather expensive in the USA.
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Employee: _____________________
Boss: Oh, I see. Sure. Thanks for telling me.

We fastened our seatbelts and soon the plane took …

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Light
1. The form of energy that illuminates our world is called light. It usually comes from hot objects, like the sun or fire, but it is also produced by electricity and some chemical reactions. Light is the only part of the electromagnetic spectrum (which includes microwaves, ultraviolet rays, and X-rays) that is invisible to the human eye. It travels at 186,000 miles (300,000 km) per second, and nothing can travel faster. Like other forms of energy, light travels in waves, but it can also travel in packets of energy called quanta. This enables it to travel through a vacuum.
2. Light rays are reflected when they hit a shiny or silvered surface, such as a still pool of water or a mirror. Reflection involves two light rays: the incoming ray and the reflected ray which bounces off the reflecting surface. The two rays are at identical angles to the reflecting surface on either side of an imaginary line.
3. Refraction is a property of all types of energy that travel in waves, including light. Light waves normally travel in straight lines, but when they pass from one transparent material to another, they usually refract, or bend. Refraction occurs because light travels at different speeds in different materials. As light from a material with a low density, such as air, enters a material with a high density, such as water, its speed is reduced. This causes it to bend (except when it enters a material at a right angle).
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Unlike all other kinds of electromagnetic radiation light …

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Technology
1. Technology is the usage and knowledge of tools, techniques, crafts, systems or methods of organization in order to solve a problem or create an artistic perspective. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments. The human species' use of technology began with the conversion of natural resources into simple tools.
2. The prehistorical discovery of the ability to control fire increased the available sources of food and the invention of the wheel helped humans in travelling in and controlling their environment. Recent technological developments, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale. However, not all technology has been used for peaceful purposes; the development of weapons of ever-increasing destructive power has progressed throughout history, from clubs to nuclear weapons.
3. Technology has affected society and its surroundings in a number of ways. In many societies, technology has helped develop more advanced economies (including today's global economy) and has allowed the rise of a leisure class. Many technological processes produce unwanted by-products, known as pollution, and deplete natural resources, to the detriment of the Earth and its environment. Various implementations of technology influence the values of a society and new technology often raises new ethical questions.
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