Vii. прочитайте следующий текст и ответьте на вопрос: since when has the federal communications commission issued various commercial “radiotelephone” licenses and permits? radiotelephone. a radiotelephone is a communications system for transmission of speech over radio. radiotelephone systems are not necessarily interconnected with the public “land line” telephone network. “radiotelephone” is often used to describe the usage of radio spectrum where it is important to distinguish the type of emission from, for example, radiotelegraph or video signals. where a two-way radio system is arranged for speaking and listening at a mobile station, and where it can be interconnected to the public switched telephone system, the system can provide mobile telephone service. since the 1930s the federal communications commission has issued various commercial “radiotelephone operator” licenses and permits to qualified applicants. these allow them to install service, and maintain voice-only radio transmitter systems for use on ships and aircraft. (until deregulation in the 1990s they were also required for commercial domestic radio and television broadcast systems. because of treaty obligations they are still required for engineers of international shortwave broadcast stations.) the certificate currently issued is the general radiotelephone operator license. the word phone has a long precedent beginning with early us wireless voice systems. the term means voice as opposed to telegraph or morse code. this would include systems fitting into the category of two-way radio or one-way voice broadcasts such as coastal maritime weather. the term is still popular in the amateur radio community and in us federal communications commission regulations.

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musalimovvlad

Английский язык

4,8(33 оценок)

Since 1930s

Кунілінгус

Английский язык

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The autonomous republic crimea the republic is situated on the crimea peninsula. it is between the black sea in the west and south, and the sea of azov — in the east. in the east the crimea is separated from russia by the kerch strait. the total area of the republic is 26 100 km2, population is 2 137 700. it is divided into 15 regions and 15 cities. symferopol is the administrative centre of the crimea. the crimea consists of two very different parts — treeless steppe of the crimean lowland in the northern and central parts, and the crimean mountains in the south. the crimean steppe, with its continental climate and steppe soils, occupies four-fifths of the territory. the crimean mountains consist of a narrow range of foothills and a low mountain chain covered with forests and high pastures. below the mountains in the south there is a narrow coastal lowland — the crimeansouthern shore — with a mediterranian climate and vegetation. the rivers are short and shallow. on the northern slopes of the crimean mountains we find the chorna, the belbek, the kacha, the alma, the salhyr and other rivers. there are also salt lakes there, such as the sasyk, the aktash and others. it is rich in natural resources, such as iron ore, natural gas, building materials, and salt from the lakes. russians constitute 67.2 percent of the population, ukrainians — 26.5 percent and there are 300 000 tatars. food production is the crimea’s main industry. food industry produces canned goods, fish and wines. agriculture mostly specializes in plant-growing, vine-growing and animal husbandry. it is followed by iron-ore mining, metallurgy and machine-building. the main sea-ports are kerch, teodosia, yalta, sevastopol, and yevpatoria. the crimea is also the main resort and tourist area of ukraine. the artist i. ayvazovsky and the polar explorer i. papanin were born in the crimea.