SofiaBlack17

19.01.2021 03:29 •  Английский язык

The first all-electronic computer, the electronic numerical integrator and calculator (eniac) was developed at the moore school of electrical engineering of the university of pennsylvania. it was developed as a result of a military need. j.presper eckert and john mauchly proposed the machine to solve the problem of calculating firing tables for new weapons. the eniac weighed 90 tons, its 18.000 vacuum tubes demanded 140 kilowatts of electric power. although it was fully electronic, the eniac had two major shortcomings: it could store and manipulate only a very limited amount of information, and its programs were wired on board. since its programs were hardwired — that is, the programs operating the computer were established by physically changing the patterns of the wires interconnecting the vacuum tubes — the machine was not so flexible in operation. these limitations made it difficult to detect errors and to change the programs. and yet, the project was successful and the eniac was used for many years to solve ballistic problems. ,найти в тексте сказуемое которая употребляется в страдательном залоге , найти сказуемое и определить его временную форму и модальный глагол