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【单选题】
在Excel中，单元格A1的内容为112，单元格A2的内容为10，单元格B2的内容为593，在C2中求A1+B2的和，应输入的公式是（）。A.
=A1+B2
B.
“A1+B2”
C.
“=A1+B2”
D.
=SUM（A1：B2）
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