Расположите пропущенные предложения в таком порядке чтобы получился связный текст Medical technology...: ответ на тест 605270 - Английский язык

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст
Medical technology applies engineering principles to the fields of biology and medicine, for example in the development of aids or replacements for defective or missing body parts. 1 _______.
Ultracane, as the name suggests, uses ultrasound (sound above the level of human hearing) to help blind people detect obstacles around them so that they can walk with more confidence. 2 _______. (Finding your location, as bats do, echoes from sound waves is called echolocation.) 3 _______. Robot surgeons are also used for keyhole surgery. 4 _______.

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Blind people or people who cannot see well often use a cane to feel their way when walking. The Ultracane is a new type of cane which helps blind people to avoid obstacles in their part. It uses echo-location, like a bat, to detect objects around the blind person. 1 _______. The cane transmits ultrasound signals. 2 _______. Sensors on the cane receive the reflected signals which are passed to a microprocessor which calculates the position and size of the object.
There are four buttons on the handle of the cane – the two which are for objects in front and overhead are on the top, and the two which are for objects on the left and right are on the back. These buttons vibrate when an object is detected. 3 _______.
People who have tried the cane say that with a little practice they can use these vibrations to make a mental map of their surroundings as they walk. Because the cane uses vibrations, not noise, they can also use their ears for additional information about their surroundings. 4 _______.

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1 _______. It consists of a transducer probe, computer, LCD monitor, keyboard, and printer. 2 _______. The computer includes a CPU which processes the data from the transducer to produce an image. 3 _______. It also contains a hard disk which stores the image along with patient details and other information. This information is keyed in by the keyboard.
4 _______.

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1_____________________________________. They in the 1950s and ’60s discovered the fun they could have experimenting with the school’s computer, which was available at night. 2_________________________________. They developed a counterculture. 3_____________________________________.
Hacking began to seem more sinister in 1988, when Robert T. Morris, a 23-year-old computer science graduate student at Cornell, created a “virus” - a destructive computer program - that spread through network and erased vital information in military and academic computers. 4____________________________________.

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1_________________________________. Of course, it provides us with a pleasant way to relax and spend free time, but some people spend an average of six hours or more a day on the network. 2____________________________________. It’s clear that the network has a powerful influence on their lives, and that its influence is often negative. 3_________________________________. Also, many people get upset or depressed when they can’t solve problems in real life as quickly as they can do it in internet games. 4_________________________________.

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1___________________________________. This needed a free and independent communication network without a centre. 2_____________________________________.
The WWW became available to everyone in 1991. 3____________________________________. Today, that number is much larger and there are now many browsers that provide Web pages, information and other services. 4___________________________________.