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请在“答题”菜单中选择相应的命令，并按照题目要求完成下面的操作。 注意：以下的文件必须保存在下。伍勇是某大学大一计算机班的班主任，平时习惯使用Excel来管理学生的成绩。现在，第一学年期末考试刚刚结束，伍老师将班里学生的成绩均录入到文件名为“学生成绩单.xlsx”的Excel工作簿文档中。请你根据下列要求帮助伍老师对该成绩单进行整理和分析： 对工作表“期末成绩表”中的数据列表进行格式化操作：将第一列“学号”列设为文本，将所有成绩列设为保留两位小数的数值；适当加大行高列宽，改变字体、字号，设置对齐方式，增加适当的边框和底纹以使工作表更加美观。
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请在“答题”菜单中选择相应的命令，并按照题目要求完成下面的操作。 注意：以下的文件必须保存在下。张文是恒运科技发展公司的一名文秘，公司最近展开一个有关如何提高员工满意度的培训，张文已经整理了一份演示文稿的素材“提高员工满意度.pptx”，请打开该文档进行美化，要求如下： 在第1张幻灯片中建立第1～6个方框的链接，单击方框时，可转到与其对应的幻灯片上，同时取消每张幻灯片单击切换的功能，另外，为第2～6张幻灯片各自定义一个图形链接，要求图形中包含“返回”两字。
请在“答题”菜单中选择相应的命令，并按照题目要求完成下面的操作。 注意：以下的文件必须保存在下。张文是恒运科技发展公司的一名文秘，公司最近展开一个有关如何提高员工满意度的培训，张文已经整理了一份演示文稿的素材“提高员工满意度.pptx”，请打开该文档进行美化，要求如下： 保存制作完成的演示文稿，并原文件名命名。
In the United States, the first day nursery, was opened in 1854. Nurseries were established in various areas during the 1 half of the 19th century; most of 2 were charitable. Both in Europe and in the U.S., the day nursery movement received great 3 during the First World War, when 4 of manpower caused the industrial employment of unprecedented (前所未有) numbers of women. In some European countries nurseries were established 5 in munitions (军火) plants, under direct government sponsorship. 6 the number of nurseries in the U.S. also rose 7 , this rise was accomplished without government aid of any kind. During the years following the First World War, 8 , federal, State, and local governments gradually began to exercise a measure of control 9 the day nurseries, chiefly by 10 them.The 11 of the Second World War was quickly followed by an increase in the number of day nurseries in almost all countries, as women were 12 called up on to replace men in the factories. On this 13 the U.S. government immediately came to the support of the nursery schools, 14 $6,000,000 in July, 1942, for a nursery school program for the children of working mothers. Many States and local communities 15 this Federal aid. By the end of the war, in August, 1945, more than 100, 000 children were being cared 16 in daycare centers receiving Federal 17 . Soon afterward, the Federal government 18 cut down its expenditures for this purpose and later 19 them, causing a sharp drop in the number of nursery schools in operation. However, the expectation that most employed mothers would leave their 20 at the end of the war was only partly fulfilled.
在关系代数运算中，有5种基本运算，它们是
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