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I’m sorry to have taken your bag by mistake。（）
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Psychology (心理学) is the study of the mind and mental activities. For example, psychologists are interested in why some things make you sad, but others make you happy. They want to know why some people are shy, but others are quite talkative. They also want to know why people do the things that they do. They test intelligence.Psychologists deal with the minds and behavior of people. Your mind consists of all your feelings, thoughts, and ideas. It is the result of one part of the brain called the cerebrum (大脑). Your behavior is the way you act or conduct yourself. Examples of behavior include shouting, crying, laughing, and sleeping.Several people have been instrumental (有重要作用的) in the field of psychology. Wilhelm Wundt set up the first psychological laboratory in Leipzig, Germany, in 1879. Ivan Pavlov, a Russian, is noted for his experiments with dogs in which he studied their reflexes and reactions. Around 1900, Sigmund Freud stated his theory that people try to repress (压制) any memories or thoughts that they believed were not good.Psychologists should not be confused with psychiatrists (精神病学家). Psychiatrists deal only with mental illness. They are medical doctors who treat people. The sentence "Some people are shy." (Line 3, Para. 1) means "（）".
According to the text, a greater sales effort is required for a product when（）
In the past, a family usually consisted of three generations (live) （） together.
某顺序存储的表格，其中有90000个元素，已按关键字的值的上升顺序排列。现假定对各个元素进行查拢的概率是相同的，并且各个元素的关键字的值皆不相同。用顺序查找法查找时，平均比较次数约为 (56) ，最大比较次数是 (57) 。现把90000个元素按排列顺序划分成若干组，使每组有g个元素(最后一组可能不足g个)。查找时，先从头一组开始，通过比较各组的最后一个元素的关键项值，找到欲查找的元素所在的组，然后再用顺序查找法找到欲查找的元素。在这种查找法中，使总的平均比较次数最小的8是 (58) ，此时的平均比较次数是 (59) ，当s的值大于90000时，此方法的查找速度接近于 (60) 。 （56）处填（）。
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