单选题The word of "impossibility" contains four morphemes.（对外经贸2006研)

单选题Duality is one of the characteristics of human language. It refers to the fact that language has two levels of structures: the system of sounds and the system of meanings.

单选题Queen Elizabeth I was Queen of England during the period from______.

单选题______Americans groan about high taxes, most accept that it would be unethical not to pay the taxes owed.

单选题When mentioning "the $ 4 million to $10 million range" (Lines 2 -3, Paragraph 3) the author is talking about _____.

单选题Point out which item does not fall under the same category as the rest.(Focus on the type of semantic relation)(南京大学2007研)

单选题The author believes that, in face of the challenge from animal rights advocates, scientists should ______.

单选题If we are not fully aware of the nature and mechanism of our language, we will be ignorant of what constitutes our essential humanity.

单选题The typical career pattern was______to men whose wives didn' t work.

单选题Today the functions of theory and observation are divided into two distinct communities in physics. Both experiments and theories are much more complex than back in Newton's time. Theorists are exploring areas of Nature in mathematics that technology so far does not allow us to observe in experiments. Many of the theoretical physicists who are alive today may not live to see how the real Nature compares with the mathematical description in their work. Today's theorists have to learn to live with ambiguity and uncertainty in their mission to describe Nature using math.Questions:

单选题Walking toward the house, a small woman saw me and ran out to usher me the rest of the distance—about 10 feet to the chair. She ran inside, brought out a cup, threw in some tea leaves, repeating the words "Longjing cha" several times and then added hot water.

单选题Which beat-poet wrote the work On the Road?

单选题The diversity of tropical plants in the region represents a seemingly ______ source of raw materials, of which only a few have been utilized.

单选题In the 20th century, the discovery of radium______ the popular imagination; not only was its discoverer, Marie Curie, idolized, but its market value______that of the rarest gemstone.

单选题Oedipus Tyrannus, The Alchemis, and Tom Jones are the three most perfect plots ever planned. And how charming, how wholesome, Fielding always is! To take him up after Richardson is like emerging from a sick room heated by stoves into an open lawn, on a breezy day in May.In the following selection, Coleridge is commenting upon Fielding"s ability as a______.

单选题The Federal Aviation Administration PART A Nobody goes up, up and away until the folks at the FAA say it's OK. The Federal Aviation Administration(FAA)is the government agency responsible for overseeing air transportation in the US. An arm of the US Department of Transportation, the FAA focuses on air transportation safety, including the enforcement of safety standards for aircraft manufacturing, operation, and maintenance. It also manages air traffic in the US through a network of towers at more than 19, 000 airports. It maintains radar systems, communication equipment, and air traffic security systems. Outside the US, the FAA works with international aviation authorities in developing safety practices implemented globally. As commercial flying emerged and increased, the Bureau of Air Commerce encouraged a group of airlines to establish the first three centers or providing air traffic control(ATC)along the airways. The pioneer air traffic controllers used maps, blackboards, and mental calculations to ensure the safe separation of aircraft travelling along designated routes between cities. The application of radar to ATC helped controllers in their drive to keep abreast of the postwar boom in commercial air transportation. The approaching era of jet travel, and a series of midair collisions, prompted passage of the Federal Aviation Act of 1958. This legislation gave rise to a new independent body, the Federal Aviation Agency. The act also gave the FAA sole responsibility for a common civil-military system of air navigation and air traffic control. PARTB Two principal categories of rules governing air traffic are visual flight rules(VFR)and instrument flight rules(IFR). Aircraft operating under visual flight rules(VFR aircraft)maintain separation from other aircraft visually. IFR aircraft in controlled airspace operate in accordance with clearances and instructions provided by air-traffic controllers for the purpose of maintaining separation and expediting the flow of traffic. Flight crews operating under instrument flight rules are responsible for seeing and avoiding other aircraft, but the air-traffic control clearances they receive provide substantial added assurance of safe separation. Consequently, flight crews often will operate under instrument flight rules even though the weather satisfies visual meteorological conditions. Many technologies are used in air traffic control systems. The radar information is used to develop clearances and instructions for separating aircraft operating under instrument rules, and to provide traffic advisories to IFR aircraft and to VFR aircraft receiving the traffic advisory service. Traffic advisories provide the ranges, bearings, and altitudes of aircraft in the pilot's immediate vicinity. The pilot is responsible for visually acquiring and avoiding any traffic that may be a collision threat. Primary and secondary radar are used to enhance a controller's "situational awareness" within his assigned airspace. Secondary radar is an interrogate-respond system. The rotating directional antenna of the ground station transmits a pulse pair to the transponder in the aircraft. The pulse spacing encodes one of two messages—"transmit your altitude"(the Mode C interrogation)or "transmit your identity"(the Mode A interrogation). The aircraft then transmits an encoded pressure-altitude reply in response to the first interrogation and a four-digit identity code, assigned by air-traffic control and entered into the transponder by the pilot, in response to the second. Primary radar operates by transmitting high-power, radio-frequency pulses from a rotating directional antenna. The energy is reflected from any aircraft in the directional beam and received by the antenna. The aircraft is displayed at the azimuth corresponding to the pointing direction of the antenna and the range corresponding to the round-trip time between pulse transmission and receipt of reflected signal. Primary radar has the advantage that aircraft without air-traffic control transponders can be detected, and energy reflected from heavy precipitation indicates to the controller areas of potentially hazardous weather. However, extraneous returns(clutter)from surrounding buildings and terrain can reduce the effectiveness of primary radar in detecting aircraft. At most air-traffic control radar sites, the secondary radar antenna is mounted on the primary radar antenna, and they are turned by a common drive system. PART C With the number of aircraft flying over the United States today, proper airspace usage is critical for flight safety and efficient service to pilots and the flying public. To assist in this goal, the airspace is divided into five classes A-E. Class A airspace is the airspace from 18 , 000 feet to 60, 000 feet. All pilots flying in Class A airspace shall file an IFR flight plan and receive an appropriate air traffic control clearance. Class B airspace is generally the airspace from the surface to 10, 000 feet. This airspace is normally around the busiest airports in terms of aircraft traffic such as Chicago or Los Angeles. Class B airspace is individually designed to meet the needs of the particular airport and consists of a surface areas and two more layers. Most Class B airspace resembles an upside down wedding cake. Pilots must contact air traffic control to receive an air traffic control clearance to enter Class B airspace. Their airspace from the surface to 4, 000 feet above the airport elevation is called the Class C airspace. Class C airspace will only be found at airports that have an operational control tower, are services by a radar approach control. Pilots must establish and maintain two-way radio communications with the ATC facility prior to entering airspace. The fourth airspace is Class D airspace which is generally that airspace from the surface to 2, 500 feet above the airport elevation. Like Class C airspace, Class D airspace only surrounds airports that have an operational control tower and is also tailored to meet the needs of the airport. Pilots are also required to establish and maintain two-way radio communications with the ATC facility before entering the airspace. No separation services will be provided to pilots of VFR aircraft. Pilots operating under VFR must still use " see-and-avoid" for aircraft separation. The fifth airspace is Class E airspace which is generally that airspace that is not Class A, B, C, or D. Class E airspace extends upward from either the surface or a designated altitude to the overlying or adjacent controlled airspace. If an aircraft is flying on a Federal airway below 18 , 000 feet, it is in Class E airspace. Class E airspace is also the airspace used by aircraft transiting to and from the terminal. Answer the following questions USING NO MORE THAN THREE WORDS from the passage.

单选题One argument A is used to support the idea B that employment will continue to be the dominant form of work, C and that employment will eventually D become available for all who want it, is that working time will continue to fall.

单选题He has told (A)me something about his new theory which he has been developing (B). I believe that his theory will offer (C)new explanations of the problem when it will be ready (D)to be published.

单选题______does not belong to Construal Operations.

单选题Emily slipped into the room lest she______her baby who was sound asleep in the sofa.