Вопрос № 347376 - Английский язык

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Health questions have been raised by the people who sit all day in front of the video display terminals (VDTs) of their computers. Are computer users getting bad radiation? What about eyestrain? And what about the age-old back problem, updated with new concerns about workers who hold their hands over a keyboard? What about repetitive-action injury also known as carpal tunnel syndrome? What about the risk of miscarriage?
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Who often asks questions about health?

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First it was aerobics. Then it was jogging. Now cycling has been declared a health hazard. Jogging was never particularly good for you, so doctors said: “Its action could damage the knees and the back.” But if cycling your way to health was ever an alternative, it may not be now.
This is because American doctors have just put a question mark against mountain biking. Almost all cyclists interviewed by one Californian doctor had suffered at least one injury in the past twelve months, so cycling may not be as healthy as you thought.
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This is because American doctors _______.

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Using upper case letters (capital letters) in a keyword search will only retrieve documents that use upper case. Typing in lower case (no capitals) is usually better because search engines will retrieve documents that use both upper case and lower case letters.

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Sir Clive Sinclair didn’t invent the home computer, but he brought it within the reach of the man in the street. 1____________________________. The Sinclair ZX80 sold for L99.95.
2_____________________________. Today’s personal computers have a memory of at least 512 Kilobytes. 3______________________________. It displayed 24 or 32-character lines on a home TV screen. 4____________________________.

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1___________________________. The computer is “told” what to do, in terms of “on” or “off”: actually, “1” or “0”. 2______________________________. A 1 or 0 is very limited information – a bit. Computers need eight bits to identify just one number or letter – a byte. 3_________________________________. 4_____________________________.

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1____________________________. Some “chips” become the computer’s memory.
 The “switches” retain the information they are given – ready to be “worked on”. 2___________________________.
A computer has to have precise instructions. 3______________________________.
Sometimes, we instruct the computer by typing on a keyboard. 4______________________________________.