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案例分析题Space TourismMake your reservations now. The space tourism industry is officially open for business, and tickets are going for a mere $20 million for a one-week stay in space. Despite reluctance from National Air and Space Administration (NASA) , Russia made American businessman Dennis Tito the world’’s first space tourist. Tito flew into space aboard a Russian Soyuz rocket that arrived at the International Space Station (ISS) on April 30, 2001. The second space tourist, South African businessman Mark Shuttleworth, took off aboard the Russian Soyuz on April 25,2002, also bound for the ISS.Lance Bass of N Sync was supposed to be the third to make the $20 million trip, but he did not join the three-man crew as they blasted off on October 30,2002, due to lack of payment. Probably the most incredible aspect of this proposed space tour was that NASA approved of it.These trips are the beginning of what could be a profitable 21st century industry. There are already several space tourism companies planning to build suborbital vehicles and orbital cities within the next two decades. These companies have invested millions, believing that the space tourism industry is on the verge of taking off.In 1997, NASA published a report concluding that selling trips into space to private citizens could be worth billions of dollars. A Japanese report supports these findings, and projects that space tourism could be a $10 billion per year industry within the next two decades. The only obstacles to opening up space to tourists are the space agencies, who are concerned with safety and the development of a reliable, reusable launch vehicle. Space AccommodationsRussia’’s Mir space station was supposed to be the first destination for space tourists. But in March 2001, the Russian Aerospace Agency brought Mir down into the Pacific Ocean. As it turned out, bringing down Mir only temporarily delayed the first tourist trip into space.The Mir crash did cancel plans for a new reality-based game show from NBC, which was going to be called Destination Mir. The Survivor-like TV show was scheduled to air in fall 2001. Participants on the show were to go through training at Russia’’s cosmonaut (宇航员) training center, Star City. Each week, one of the participants would be eliminated from the show, with the winner receiving a trip to the Mir space station. The Mir crash has ruled out NBC’’s space plans for now. NASA is against beginning space tourism until the International Space Station is completed in 2006.Russia is not alone in its interest in space tourism. There are several projects underway to commercialize space travel. Here are a few of the groups that might take tourists to space:-Space Island Group is going to build a ring-shaped, rotating "commercial space infrastructure (基础结构)" that will resemble the Discovery spacecraft in the movie "2001: A Space Odyssey. "Space Island says it will build its space city out of empty NASA space-shuttle fuel tanks (to start, it should take around 12 or so) , and place it about 400 miles above Earth. The space city will rotate once per minute to create a gravitational pull one-third as strong as Earth’’s.-According to their vision statement, Space Adventures plans to "fly tens of thousands of people in space over the next 10-15 years and beyond, around the moon, and back, from spaceports both on Earth and in space, to and from private space stations, and aboard dozens of different vehicles..."-Even Hilton Hotels has shown interest in the space tourism industry and the possibility of building or co-funding a space hotel. However, the company did say that it believes such a space hotel is 15 to 20 years away.Initially, space tourism will offer simple accommodations at best. For instance, if the International Space Station is used as a tourist attraction, guests won’’t find the luxurious surroundings of a hotel room on Earth. It has been designed for conducting research, not entertainment. However, the first generation of space hotels should offer tourists a much more comfortable experience. In regard to a concept for a space hotel initially planned by Space Island, such a hotel could offer guests every convenience they might find at a hotel on Earth, and some they might not. The small gravitational pull created by the rotating space city would allow space-tourists and residents to walk around and function normally within the structure. Everything from running water to a recycling plant to medical facilities would be possible. Additionally, space tourists would even be able to take space walks.Many of these companies believe that they have to offer an extremely enjoyable experience in order for passengers to pay thousands, if not millions, of dollars to ride into space. So will space create another separation between the haves and have-nots The Most Expensive VacationWill space be an exotic retreat reserved for only the wealthy Or will middle-class folks have a chance to take their families to space Make no mistake about it, going to space will be the most expensive vacation you ever take. Prices right now are in the tens of millions of the dollars. Currently, the only vehicles that can take you into space are the space shuttle and the Russian Soyuz, both of which are terribly inefficient. Each spacecraft requires millions of pounds of fuel to take off into space, which makes them expensive to launch. One pound of payload (有效载重) costs about $10,000 to put into Earth’’s orbit.NASA and Lockheed Martin are currently developing a single-stage-to-orbit launch space plane, called the Venture-Star, that could be launched for about a tenth of what the space shuttle costs to launch. If the Venture-Star takes off, the number of people who could afford to take a trip into space would move into the millions.In 1998, a joint report from NASA and the Space Transportation Association stated that improvements in technology could push fares for space travel as low as $50,000, and possibly down to $20,000 or $10,000 a decade later. The report concluded that at a ticket price of $50,000, there could be 500,000 passengers flying into space each year. While still leaving out many people, these prices would open up space to a tremendous amount of traffic.Since the beginning of the space race, the general public has said, "Isn’’t that great — when do I get to go" Well, our chance might be closer than ever. Within the next 20 years, space planes could be taking off for the Moon at the same frequency as airplanes flying between New York and Los Angeles. Within the next two decades, ________could be as common as intercity air travel.

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What do we learn from the conversation()

A. Jim’s notes are not very good.
B. Professor Harrison doesn’t teach well.
C. Mary should have come to the lecture earlier.
D. Mary doesn’t have to borrow notes from Jim.

在多媒体计算机中,语音和音乐是最基本的功能之一。实现模拟音频数字化的主要过程是 (12) 、量化和编码。人们通常用8位声卡或16位声卡来区分不同的声卡质量。若量化位是8位,并规定输入信号幅度为0~3V,则每一量化单位约对应 (13) mV。声卡需使用计算机的资源,因此在安装声卡时要分配适当的中断请求号、 (14) 和直接存取通道号。

A. 3
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D. 100

What is the woman’s occupation()

A. She is a high school student.
B. She is an opera singer.
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Emotion is a feeling about or reaction to certain important events or thoughts. People enjoy feeling such pleasant emotions as love, happiness, and contentment. They often try to avoid feeling unpleasant emotions, such as loneliness, worry, and grief. Individuals communicate most of their emotions by means of words, a variety of sounds, facial expressions, and gestures. For example, anger causes many people to frown, make a fist. and yell. People learn ways of showing some of their emotions from members of their society, though heredity(遗传) may determine some emotional behavior. Research has shown that different isolated peoples show emotions by means of similar facial expressions. Charles Darwin, famous for the theory of natural selection, also studied emotion. Darwin said in 1872 that emotional behavior originally served both as an aid to survival and as a method of communicating intentions. According to the James-Lange theory of emotions developed in the 1880s, people feel emotions only if aware of their own internal physical reactions to events, such as increased heart rate or blood pressure. But this theory was not upheld by research on cats that had their nervous systems damaged. The cats could not feel their body’s internal changes, but they showed normal emotional behavior. John B. Watson, an American psychologist who helped found the school of psychology called behaviorism, observed that babies stimulated by certain events showed three basic emotions—fear, anger, and love. Watson’s view has been challenged frequently since he proposed it in 1919. The most widely accepted view is that emotions occur as a complex sequence of events. The sequence begins when a person encounters an important event or thought. The person’s interpretation of the encounter determines the feeling that is likely to follow. For example, someone who encounters a bear in the woods would probably interpret the event as dangerous. The sense of danger would cause the individual to feel fear. Each feeling is followed by physical changes and desires to take action, which are responses to the event that started the sequence. Thus, a person who met a bear would probably run away. Several American psychologists independently developed the theory that there are eight basic emotions. These emotions—which can exist at various levels of intensity—are anger, fear, joy, sadness, acceptance, disgusts, surprise, and interest or curiosity. They combine to form all other emotions, just as certain basic colors produce all others.

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