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21.12.2021 19:13 •  Английский язык

Circle the correct answer to complete the sentences. 1) the first radio-controlled mechanisms a) weapons. b) garage doors. c) motorboats. d) spaceships. 2) the first remote control for opening the garage door was a) before 1940. b) in the late 1940s. c) in the 1950s. d) after 1950. 3) the remote control first used for operating tv set was a) «lazy bones». b) «zenith». c) «flashmatic». d) «tv electronics». 4) switching the tv channels by «flashmatic» was not always convenient because a) the cable lying on the floor. b) the direct rays of the sun. c) its simple design. d) its difficult system of using. listening comprehension (the second term) variants 1, 2 1. remote control the first machines to be operated by remote control were used mainly for military purposes. radiocontrolled motorboats, developed by the german navy, were used in world war i. radio-controlled bombs and other remote control weapons were used in world war ii. once the wars were over, united states scientists experimented to find non-military uses for remote control. in the late 1940s automatic garage door openers were invented, and in the 1950s the first tv remote controls were used. the first tv remote control, called «lazy bones», was developed in 1950 by zenith electronics corporation. it used a cable that ran from the tv set to the viewer. a motor in the tv set operated the tuner through the remote control. although customers liked having remote control of their television, they complained that people tripped over the cable that was lying across the living room floor. 71 zenith engineer eugene polley invented the «flashmatic», which was introduced in 1955 and represented the industry’s first wireless tv remote control. while it pioneered the concept of wireless tv remote control, the «flashmatic» had some limitations. it was a simple device that had no protection circuits and, if the tv happened to be in an area in which the sun shone directly on it, the viewers had difficulties in switching the channels.