题目内容
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。
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What is the woman’s occupation（）
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.
According to her, what was the most difficult about becoming a taxi driver（）
Throughout the nation’’s more than 15,000 school districts, widely differing approaches to teaching science and math have emerged. Though there can be strength in diversity, a new international analysis suggests that this variability has instead contributed to lackluster (平淡的) achievement scores by U.S. children relative to their peers in other developed countries. Indeed, concludes William H. Schmidt of Michigan State University, who led the new analysis, "no single intellectually coherent vision dominates U.S. educational practice in math or science. " The reason, he said, "is because the system is deeply and fundamentally flawed." The new analysis, released this week by the National Science Foundation in Arlington, Va. , is based on data collected from about 50 nations as part of the Third International Mathematics and Science Study. Not only do approaches to teaching science and math vary among individual U.S. communities, the report finds, but there appears to be little strategic focus within a school district’’s curricula, its textbooks, or its teachers’’ activities. This contrasts sharply with the coordinated national programs of most other countries. On average, U.S. students study more topics within science and math than their international counterparts do. This creates an educational environment that "is a mile wide and an inch deep," Schmidt notes. For instance, eighth graders in the United States cover about 33 topics in math versus just 19 in Japan. Among science courses, the international gap is even wider. U.S. curricula for this age level resemble those of a small group of countries including Australia, Thailand, Iceland, and Bulgaria. Schmidt asks whether the United States wants to be classed with these nations, whose educational systems "share our pattern of splintered (支离破碎的) visions" but which are not economic leaders. The new report "couldn’’t come at a better time," says Gerald Wheeler, executive director of the National Science Teachers Association in Arlington, "The new National Science Education Standards provide that focused vision," including the call "to do less, but in greater depth." Implementing the new science standards and their math counterparts will be the challenge, he and Schmidt agree, because the decentralized responsibility for education in the United States requires that any reforms be tailored and instituted one community at a time. In fact, Schmidt argues, reforms such as these proposed national standards "face an almost impossible task, because even though they are intellectually coherent; each becomes only one more voice in the babble (嘈杂声).” According to the passage, the teaching of science and math in America is________.
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