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esc: delete cell contenttab: next cell in the rowenter: next cell in the columndecimal number: 1 2/4

switch between book1 and book2:window-->a list of workbooksto display multi workbooks:window-->arrangement

autosum: calculates the sum for either the row or column

white cross: selectblack 4 headed cross: boundary, move black cross: auto fill in

功能维护升级中，维护完成完后将再次开放，非常抱歉给您学习造成的不便。

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