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In an interview last month, Frank Church, chairman of the Senate committee which is investigating the CIA, issued an oblique but impassioned warning, that the technology of eavesdropping had become so highly developed that Americans might soon be left with "no place to hide". That day may have arrived. Newsweek has learned that the country’s most secret intelligence operation, the National Security Agency, already possesses the computerized equipment to monitor nearly all overseas telephone calls and most domestic and international printed messages.The agency’s devices monitor a great deal of telephone circuits, cable lines and the microwave transmissions that carry an increasing share of both spoken and written communications. Computers are programed to watch for "trigger" words or phrases indicating that a message might interest intelligence analysis, when the trigger is pulled, entire messages are tape-recorded or printed out.That kind of eavesdropping is, however, relatively simple compared with the breakthroughs that lie ahead in the field of snoopery. Already it is technically feasible to "bug" an electric typewriter by picking up its feeble electronic emissions from a remote location and then change them into words. And some scientists believe that it may be possible in the future for remote electronic equipment to intercept and "read" human brain waves.Where such capabilities exist, so too does the potential for abuse. It is the old story of technology rushing forward with some new wonder, before the men who supposedly control the machines have found how to prevent the machines from controlling them. The warning given by Frank Church is().
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某施工单位承建某大厦工程，总建筑面积30000m2，该工程位于市中心，现场场地狭窄，施工单位为降低成本，现场只设置了一条3m宽的施工道路兼作消防通道。现场平面呈长方形，其斜对角布置了两个消火栓，两者之间相距70m，其中一个距拟建建筑物3m．另—个距拟建建筑物33m。 对消防器材的配备描述正确的有( )。
Education is compulsory and free for every child in America. Most children start school by the age of six. They attend eight years of elementary school and four years of high school, The money for free public schools comes from taxes, and every state is responsible for its own educational system. State legislatures set the educational requirement but leave the management of the schools in the hands of the local communities. Most states require their children to go to school until a certain age. This age varies from 16 to 18 years, according to the laws of the individual states. The Federal government contributes funds to the states for additional schools and school services.After graduation from high school, a student can start his higher education in a two-year college or university. The cost of a college education is expensive in private universities, but it is much cheaper in those supported by states and cities. Many students receive scholarships from the schools, the government or private foundations. More than 50 percent of college students work to help pay their college expenses. At what age do most children start school()
In Anglo-America there are three major ethnic groups. The first is the original Indian population, who today represents a minority group. The second is the descendants of European colonists who emigrated to the two countries before the end of the nineteenth century. These majority populations normally speak English, are highly-educated, and most of them are culturally homogeneous (同类的) in broad cultural values. A third group is made up of ethnic minorities, from Asia, Latin America, Africa, or parts of Europe who have either linguistic, religious, racial, or other cultural attributes that distinguish them from the majority population.The United States has a varied ethnic minority pattern, without the dominance of one minority group in a specific geographical area. The largest ethnic group in America is the blacks, totaling an estimated 26 million in 1980, or 12 percent of the population. Unlike the French, the black population of the United States is not culturally and geographically isolated in one area. Slightly more than half of American blacks live in the South, and 49 percent reside in the East and the West. The black American speaks English, has a tendency to share, the characteristics of competition, materialism, and individualism with other United States citizens, and has no distinctive religion.The Spanish-speaking minority in America is reluctant to adopt the values of the dominant cultural group. There is increasingly a demand for bilingual (双语的) education to allow Spanishspeaking children to use English in their educational programs. The existence of a large and growing minority population such as the Spanish-speaking Americans, who are increasingly committed to their own food and newspapers in Latin, is one of the issues facing Anglo-America in the future. The old concept of a melting pot is being replaced by the concept of a plural society. As far as the writing technique is concerned, the author mainly resorts to().
Predictions of many robots in industry have yet come true. For ten years or more, manufacturers of big robots have explained how their machines can make industry more competitive and productive. The maker for (21) robots is oversupplied now, and the driving force of the robotics(机器人学) revolution is (22) to be with makers of machines that handle a few kilos at most."Heavy-robot manufacturers are in some difficulty (23) finding customer. They are offering big (24) just to get in the door. There has been a (23) growth everywhere in the numbers of robots, so we admit we are either deceiving (26) or that the market is slowly growing. "said John Reekie, chairman of Colen Robotics. "The following things must happen (27) the robotics revolution to occur. We must achieve widespread robot literacy, (28) there has been a computer (29) program, there must be a robot prices. (30) , some kind of artificial intelligence needs to be (31) ."Colen makes educational robots and machine tools. It is small (32) with companies like ASEA or Fujitsu Fanuc. But Colen with others and departments in universities such as Surrey, Manchester, and Durham possess an advantage (33) . the giants. The big companies sell very expensive (34) to businesses with expert knowledge in automation. The (35) companies make robots for teaching people, and now they have realized that there is a need for small, (36) robots that they can meet.The little companies either bring their educational machines (37) an industrial standard or design from the start. One technique that they all adopt is to choose (38) components where possible. The major cost of making (39) their models is the electronics, which will fall in price. There is (40) scope for reductions in mechanical costs. The sue of standard parts, which are easily replaced, should give these robots a mechanical life of something in the order of five years. 37().
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