Which statement about immersion suits is TRUE?A. The suit is flameproof and provides protection to the wearer while swimming through burning oil.B. Prior to abandonment, the suit allows body movement such as walking, climbing a ladder and picking up small objects.C. The wearer of the suit is severely restricted and requires twice the time to climb a ladder then without the suit.D. The immersion suit seals in body heat and provides protection against hypothermia for weeks.

The doctor ____ is leaving for Africa next month.A. the nurse is talking to himB. whom the nurse is talkingC. the nurse is talking toD. who the nurse is talking

In IALA Region B, when entering from sea, a day mark on the port side of the channel would be indicated on a chart by a _.A. White Square with the letters GRB. white triangle with the letters RGC. red triangle with the letter RD. green square with the letter G

The restaurant ___ we went to last week was very crowded.A. wheneverB. thatC. whoD. whose

The Development of Television Technology Radio and television were major agents of social change in the 20th century. Radio was once the center for family entertainment and news. Television enhanced this revolution by adding sight to sound. Both opened the windows to other lives, to remote areas of the world, and to history in the making. News coverage changed from early and late editions of newspapers to broadcast coverage from the scene. Play-by-play sports broadcasts and live concerts enhanced entertainment coverage. For many, the only cultural performances or sports events they would ever hear or see would emanate from the speakers or the screens in their living rooms. Each has engaged millions of people in the major historical events that have shaped the world. If people could look at the sky and see how it is organized into frequency bands used for different purposes, they would be amazed. Radio waves crisscross the atmosphere at the speed of light, relaying incredible amounts of information---navigational data, radio signals, television pictures--using devices for transmission and reception designed, built, and refined by a century of engineers. Key figures in the late 1800s included Nikola Tesla, who developed the Tesla coil, and James Clerk Maxwell and Heinrich Hertz, who proved mathematically the possibility of transmitting electromagnetic signals between widely separated points. It was Guglielmo Marconi who was most responsible for taking the theories of radio waves out of the laboratory and applying them to practical devices. His "wireless" telegraph demonstrated its great potential for worldwide communication in 1901 by sending a signal--the letter "s"--in Morse code a distance of 2,000 miles across the Atlantic Ocean. Radio technology was just around the comer. Immediate engineering challenges addressed the means of transmitting and receiving coded messages, and developing a device that could convert a high frequency oscillating signal into an electric current capable of registering as sound. The first significant development was "the Edison effect", the discovery that the carbon filament in the electric light bulb could radiate a stream of electrons to a nearby test electrode if it had a positive charge. In 1904, Sir John Ambrose Fleming of Britain took this one step further by developing the diode which allowed electric current to be detected by a telephone receiver. Two years later, American Lee De Forest developed the triode, introducing a third electrode (the grid) between the filament and the plate. It could amplify a signal to make live voice broadcasting possible, and was quickly added to Marconi’s wireless telegraph to produce the radio. Radio development was hampered by restrictions placed on airwaves during World War I. Technical limitations were also a problem. Few people had receivers, and those that did had to wear headsets. Radio was seen by many as a hobby for telegraphy buffs. It would take a great deal of engineering before the radio would become the unifying symbol of family entertainment and the medium for news that was its destiny. In the mid-1920s, technical developments expanded transmission distances, radio stations were built across the country, and the performance and appearance of the radio were improved. With tuning circuits, capacitors, microphones, oscillators, and loudspeakers, the industry blossomed in just a decade. By the mid-1930s almost every American household had a radio. The advent of the transistor in the 1950s completely transformed its size, style, and portability. Both television and radar were logical spin-offs of the radio. Almost 50 years before television became a reality, its fundamental principles had been independently developed in Europe, Russia, and the United States. John Baird in England and Charles Jenkins in the United States worked independently to combine modulated light and a scanning wheel to reconstruct a scene in line-by-line sweeps. In 1925, Baird succeeded in transmitting a recognizable image. Philo T. Farnsworth, a 21-year-old inventor from Utah, patented a scanning cathode ray tube, and Vladimir Zworykin of RCA devised a superior television camera in 1930. Regularly scheduled broadcasts started shortly thereafter, and by the early 1940s there were 23 television stations in operation throughout the United States. Shortly after World War Ⅱ, televisions began to appear on the market. The first pictures were faded and flickering, but more than a million sets were sold before the end of the decade. An average set cost 500 at a time when the average salary was less than 3,000 a year. In 1950 engineers perfected the rectangular cathode-ray tube and prices dropped to 200 per set. Within 10 years 45 million units were sold. A study of how human vision works enabled engineers to develop television technology. Images are retained on the retina of a viewer’s eye for a fraction of a second after they strike it. By displaying images piece by piece at sufficient speed, the illusion of a complete picture can be created. By changing the image on the screen 25 to 30 times per second, movement can be realistically represented. Early scanning wheels slowly built a picture line by line. In contrast, each image on a modem color television screen is comprised of more than 100,000 picture elements (pixels), arranged in several hundred lines. The image displayed changes every few hundredths of a second. For a 15-minute newscast, the television must accurately process more than 1 billion units of information. Technical innovations that made this possible included a screen coated with millions of tiny dots of fluorescent compounds that emit light when struck by high-speed electrons. Today this technology is in transition again, moving away from conventional television waves and on to discrete digital signals carried by fiber optics. This holds the potential for making television interactive--allowing a viewer to play a game or order action replays. Cathode ray tubes with power-hungry electron guns are giving way to liquid crystal display (LCD) panels. Movie-style wide screens and flat screens are readily available. Digital signals enable High Definition Television (HDTV) to have almost double the usual number of pixels, giving a much sharper picture. The advent of cable television and advances in fiber-optic technology will also help lift the present bandwidth restrictions and increase image quality.In the 1950s, the appearance of ______ brought thorough changes to the outlook and portability of radio. A．capacitorsB．microphonesC．transistorsD．loudspeakers

After walking for three hours we stopped _____ others catch _____ us.A. letting; up onB. to let; /C. to let; up withD. letting; up for

5. (2.0分) Could you tell me where the library is?该句属于什么从句?A. 宾语从句B. 定语从句C. 状语从句D. 主语从句

Robert F. Kennedy once said that a country’s GDP measures “everything except that which makes life worthwhile”. With Britain voting to leave the European Union, and GDP already predicted to slow as a result, it is now a timely moment to assess what he was referring to. The question of GDP and its usefulness has annoyed policymakers for over half a century. Many argue that it is a flawed concept It measures things that do not matter and misses things that do. By most recent measures, the UK’s GDP has been the envy of the Western world, with record low unemployment and high growth figures. If everything, was going so well, then why did over 17 million people vote for Brexit, despite the warnings about what it could do to their country’s economic prospects? A recent annual study of countries and their ability to convert growth into well-being sheds some light on that question. Across the 163 countries measured, the UK is one of the poorest performers in ensuring that economic growth is translated into meaningful improvements for its citizens. Rather than just focusing on GDP, over 40 different sets of criteria from health, education and civil society engagement have been measured to get a more rounded assessment of how countries are performing. While all of these countries face their own challenges, there are a number of consistent themes. Yes, there has been a budding economic recovery since the 2008 global crash, but in key indicators in areas such as health and education, major economies have continued to decline. Yet this isn’t the case with all countries. Some relatively poor European countries have seen huge improvements across measures including civil society, income equality and the environment. This is a lesson that rich countries can learn; When GDP is no longer regarded as the sole measure of a country’s success, the world looks very different. So, what Kennedy was referring to was that while GDP has been the most common method for measuring the economic activity of nations, as a measure, it is no longer enough, It does not include important factors such as environmental quality or education outcomes — all things that contribute to a person’s sense of well-being. The sharp hit to growth predicted around the world and in the UK could lead to a decline in the everyday services we depend on for our well-being and for growth. But policymakers who refocus efforts on improving well-being rather than simply worrying about GDP figures could avoid the forecasted doom and may even see progress. 【小题1】Robert F, Kennedy is cited because he . A．praised the UK for its GDP B．identified GDP with happiness C．saw the problem with GDP D．misinterpreted the role of GDP 【小题2】Which of the following is true about the recent annual study? A．It is sponsored by 163 countries. B．It excludes GDP as an indicator. C．Its criteria are questionable. D．Its results are inspiring. 【小题3】In the last two paragraphs, the author suggests that . A．the UK is preparing for an economic boom B．high GDP predicts an economic decline C．it is essential to consider factors beyond GDP D．it requires caution to handle economic issues 【小题4】Which of the following is the best title for the text? A．High GDP But Inadequate Well-being, a UK Lesson B．GDP Figures, a Window on Global Economic Health C．Robert F. Kennedy, a Terminator of GDP D．Brexit, the UK’s Gateway to Well-being

[1] Robert F. Kennedy once said that a country's GDP measures "everything except that which makes life worthwhile". With Britain voting to leave the European Union, and GDP already predicted to slow as a result, it is now a timely moment to assess what he was referring to.[2] The question of GDP and its usefulness has annoyed policymakers for over half a century. Many argue that it is a flawed concept. It measures things that do not matter and misses things that do. By most recent measures, the UK's GDP has been the envy of the Western world, with record low unemployment and high growth figures. If everything was going so well, then why did over 17 million people vote for Brexit, despite the warnings about what it could do to their country's economic prospects?It can be inferred from Paragraph 2 that.A.the UK is reluctant to remold its economic patternB.the UK will contribute less to the world economyC.GDP as the measure of success is widely defied in the UKD.policymakers in the UK are paying less attention to GDP.

While underway in thick fog you are on watch and hear the cry "man overboard." Which type of maneuver should you make?A. Figure eight turn.B. Round turnC. Williamson turnD. Racetrack turn.