Предмет: Английский язык, автор: elvirasupilova1

Помогите пожалуйста не понимаю

Приложения:

elvirasupilova1: Срочно надо
lianotlia: это скорее как правило, наверное вам задали выучить

Ответы

Автор ответа: bondaretsinna
0

Ответ:

Якщо я не помиляюся Використанн

Если не ошибаюсь ты должен это выучить когда и где нужно вставлять is и т.д думаю понятно

я

Объяснение:

Похожие вопросы
Предмет: Алгебра, автор: belcenkamikita
Предмет: Математика, автор: arestanovarsen
Предмет: Английский язык, автор: gelyaglambet
Прочитайте и переведите предложенный текст. Передайте краткое содержание текста на иностранном языке. Составьте письменную аннотацию текста на иностранном языке. GENERATIONS OF COMPUTERS The history of computer development is often discussed with reference to different generations of computing devices. In computer terminology, the word generation is described as a stage of technological development or innovation. A major technological development that fundamentally changed the way computers operate resulting in increasingly smaller, cheaper, more powerful and more efficient and reliable devices characterize each generation of computers. 1. First Generation (1940-1956):Vacuum Tubes First generation computers were vacuum tube / thermionic valves-based machines. These computers used vacuum tubes for circuitry and magnetic drums for memory. A magnetic drum is a metal cylinder coated with magnetic iron-oxide material on which data and programs can be stored. Input was based on punched cards and paper tape, and output was displayed on printouts. First generation computers relied on binary-coded language (language of 0s and 1s) to perform operations and were able to solve only one problem at a time. Each machine was fed with different binary codes and hence were difficult to program. This resulted in lack of versatility and speed. In addition, to run on different types of computers, instructions must be rewritten or recompiled. Examples: ENIAC, EDVAC, and UNIVAC. 2. Second Generation Computers (1956-1963):Transistors In the sixties, there was lot of development in semiconductor field - a field of materials. In vacuum tubes, a filament is heated to emit electrons,(the basic component of an atom)that carry cur-rent. In 1946,Willam Shockley and a few of his colleagues invented transistors, which do not need any heating to liberate electrons in addition to being smaller in size, they saved power due to the absence of heating and hence the cooling needed. the smaller size resulted in smaller distances that the electrons have to travel to transmit information from one part of the computer to another. Hence calculations became faster. The reliability also increased. Today you cannot see any second generation computers. The smaller size of components saw mass production of computers which became cheaper. Many companies started buying and using them increasing the demand. Computer programming languages developed further to make programming easier and user friendly. Yet if you compare to-day’s computers, they were a lot behind. The increased use of computers and the consequent mass production sent the prices crashing down. Computer scientists and electronic engineers were developing more sophisticated computers. 3. Third Generation Computers(1964 - early 1970s):Integrated circuits In second generation computers, one could recognize the circuit components such as transistors, resistors and capacitors distinctly. There were physically separate or “discreet”. Slowly scientists started integrating these components together so that they are not separate. They were fused into the circuits. People called it large scale integrated circuits (LSI). Computers using such components were called third generation computers. Since components were packed together more densely, the size of computers became smaller. Programmers also developed more sophisticated software. By 1970, engineers developed a device called microprocessor. Lot of circuits was packed into it. Intel 4004 was one such chip. Составьте устное сообщение по предложенной теме на иностранном языке. "Speak on the topic “Modern technologies”