对工作表“计算机动画技术”成绩单内的数据清单的内容案主要关键字为“考试成绩”的递减次序和次要关键字为“学号”的递增次序进行排序，排序后的工作表还保存在EXA.XLS工作簿文件中，工作表名不变。
参考答案：打开EXCEL.XLS，首先选定工作表中Sheet1的 A1：D1区域，单击常用工具栏上的[*]按钮即可。双击D3，键入“=B3*C3”，按[Enter]键确认，按上述步骤完成D4、D5单元格操作。双击 Sheet1，输入“图书销售情况表”，按[Enter]键确认。
2. 打开EXA.XLS，单击“数据”菜单选择“排序”命令，在弹出的菜单中，主要关键字选择“考试成绩”，选中“降序”，次关键字选择“学号”，选中“升序”，下面的步骤选择默认值，单击“确定”按钮。单击[*]按钮完成原名保存。
Directions: There are 10 blanks in the following passage. For each numbered blank, there are 4 choices marked A, B, C and D.
| It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the bases (51) the decisions we make, and the roots of our habits and skills are to be (52) in our past experiences, which are brought into the present (53) memory. Memory can be defined as the capacity to keep (54) available for later use. It includes not only "remembering" things like arithmetic or historical facts, but also any change in the way an animal typically behaves. Memory is (55) when a rat gives up eating grain because he has sniffed something suspicious in the grain pile. Memory is also involved when a six-year-old child learns to swing a baseball bat. Memory (56) not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. It is interesting to compare the memory-storage capacity of a computer (57) that of a human being. The in stant-access memory of a large computer may hold up to 100 000 "words" —ready for (58) use. An average American teenager probably recognizes the meanings of about 100 000 words of English. However, this is but a fraction of the total (59) of information which the teenager has stored. Consider, for example, the number of facts and places that the teenager can recognize on sight. The use of words is the basis of the advanced problem-solving intelligence of human beings. A large part of a person’s memory is in terms of words and (60) of words. |
A．exists
B．appears
C．affects
D．seems