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设单元格C1中的公式为：=A1+$B$2，若将该公式复制到单元格D1，则D1中的公式应该为（)A．=A1+$B$2B．=$

设单元格C1中的公式为：=A1+$B$2，若将该公式复制到单元格D1，则D1中的公式应该为()

A．=A1+$B$2

B．=$A$1+$C$2

C．=B1+$B$2

D．=B2+$A$1

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